Answer:
P=1/12
Step-by-step explanation:
From Exercise we have ten people are in a room wearing badges marked 1 through 10.
For first man we conlude that the probability that is 5/10, that his number at least 6.
For second man we conlude that the probability that is 4/9, that his number at least 6.
For third man we conlude that the probability that is 3/8, that his number at least 6.
Therefore, the probability is
P=5/10 · 4/9 · 3/8 = 1/12
P=1/12
The R-value of insulation is a measure of its ability to resist heat transfer. For fiber-glass insulation, 3½ inches is rated at R-11 and 6 inches is rated at R-19. Assuming this relationship is linear, write the equation that gives the R-value of fiberglass insulation as a function of its thickness t (in inches).
R =
Answer:
[tex]R = \dfrac{16}{5}t + \dfrac{1}{5}[/tex]
where R is the R-value and t is the thickness in inches.
Step-by-step explanation:
We are given the following in the question:
The R-value of fiberglass insulation and f its thickness have a linear relation.
Let R be the R-value and t be the thickness. Then, the equation can be written as:
[tex]R = at + b[/tex]
where a and b are constants.
When t = 3.5, R = 11
[tex]11 = 3.5a + b[/tex]
When t = 6, R = 19
[tex]19 = 6a + b[/tex]
Solving the two equation, using the elimination method, we have,
[tex]19-11 = 6a + b-(3.5a + b)\\8 = 2.5a\\\\\Rightarrow a = \dfrac{16}{5}\\\\11 = 6(\dfrac{16}{5}) + b\\\\\Rightarrow b = \dfrac{1}{5}[/tex]
Thus, the linear relationship is given by:
[tex]R = \dfrac{16}{5}t + \dfrac{1}{5}[/tex]
where R is the R-value and t is the thickness in inches.
To find a linear equation (R = mt + b) that represents the R-value of fiberglass insulation as a function of its thickness, we calculate a slope (m) of 3.2 using two known measurements. We then solve for a y-intercept (b), which is -0.5. Therefore, the equation is R = 3.2t - 0.5.
Explanation:In order to derive the equation that gives the R-value as a function of the thickness, we need to use the concept of linear equations, specifically slope-intercept form (y = mx + b). First, we need to find the slope (m). Since we know two points on the line (3 ½ , 11) and (6 , 19), we calculate the slope as: m = (19-11) / (6 - 3½) = 8 / 2½ = 3.2. The y-intercept (b) is the R-value when the thickness (t) is 0. To find it, we use one of our points and the slope in the equation y = mx + b, substituting to solve for b: 11 = 3.2 * 3½ + b, hence, b = -0.5. The equation is therefore: R = 3.2t - 0.5.
Learn more about Linear Equations here:https://brainly.com/question/32634451
#SPJ3
3:
At the zoo, the aquarium is 36 feet north of the gift shop. The monkey habitat is 323 feet east of the gift shop. What is the distance, in feet, from the aquarium to the monkey habitat?
The distance between the aquarium and the monkey habitat is 325 feet.
To find the distance between the aquarium and the monkey habitat, we can use the Pythagorean theorem because the aquarium and the monkey habitat form a right triangle with the gift shop.
Let's denote the distance between the aquarium and the gift shop as a (36 feet) and the distance between the monkey habitat and the gift shop as b (323 feet). The distance between the aquarium and the monkey habitat, which we'll call c, is the hypotenuse of the right triangle.
The Pythagorean theorem states that in a right triangle, the square of the length of the hypotenuse c is equal to the sum of the squares of the lengths of the other two sides a and b.
[tex]\[ c^2 = a^2 + b^2 \][/tex]
Substitute the given values:
[tex]\[ c^2 = (36)^2 + (323)^2 \][/tex]
[tex]\[ c^2 = 1296 + 104329 \][/tex]
[tex]\[ c^2 = 105625 \][/tex]
Take the square root of both sides to solve for c:
[tex]\[ c = \sqrt{105625} \][/tex]
[tex]\[ c = 325 \][/tex]
Harper picked 3.5 baskets of apples. Cooper picked 4 1/4 baskets of apples did Harper and cooper pick together? Express your answer as a decimal number and as a mixed number
Answer:
The number of basket of apples picked by Harper and Cooper together is [tex]5\frac{1}{4} \ \ Or \ \ 5.25[/tex].
Step-by-step explanation:
Given:
Number of basket picked by Harper = 3.5
Number of basket picked by cooper = [tex]4\frac{1}{4}[/tex]
We need to find the number of basket of apples picked by Harper and Cooper together.
Solution:
Now we can see that one number is in decimal form and other number is in mixed fraction form so we will convert both the number in simplest fraction form and then solve the same.
Number of basket picked by Harper = 3.5
Now if we divide 7 from from 2 we get the answer as 3.5 so we can say that;
3.5 can be rewritten as [tex]\frac{7}{2}[/tex]
Number of basket picked by Harper = [tex]\frac{7}{2}[/tex]
Number of basket picked by cooper = [tex]4\frac{1}{4}[/tex]
[tex]4\frac{1}{4}[/tex] can be rewritten as [tex]\frac{17}{4}[/tex]
Number of basket picked by cooper = [tex]\frac{17}{4}[/tex]
Now we can say that;
to find the number of basket of apples picked by Harper and Cooper together we will add Number of basket picked by Harper and Number of basket picked by cooper.
framing in equation form we get;
number of basket of apples picked by Harper and Cooper together = [tex]\frac{7}{2}+\frac{17}{4}[/tex]
now we will use LCM to make the denominator common we get;
number of basket of apples picked by Harper and Cooper together = [tex]\frac{7\times2}{2\times2}+\frac{17\times1}{4\times1}=\frac{14}{4}+\frac{17}{4}[/tex]
Now denominators are common so we will solve the numerators we get;
number of basket of apples picked by Harper and Cooper together = [tex]\frac{14+7}{4} = \frac{21}{4} \ \ Or\ \ 5\frac{1}{4} \ \ Or \ \ 5.25[/tex]
Hence the number of basket of apples picked by Harper and Cooper together is [tex]5\frac{1}{4} \ \ Or \ \ 5.25[/tex].
The violent-crime rate in a certain state of the country in that year was 1,496. Would this be an outlier? O A. No, because it is less than the upper fence OB. Yes, because it is less than the upper fence. OC. Yes, because it is greater than the upper fence. OD. No, because it is greater than the upper fence (d) Do you believe that the distribution of violent-crime rates is skewed or symmetric?
Answer:
The violent-crime rate in a certain state of the country in that year was 1,496
Would this be an outlier?
C. Yes, because it is greater than the upper fence.
(d) Do you believe that the distribution of violent-crime rates is skewed or symmetric?
C. The distribution of violent-crime rates is skewed right.
Step-by-step explanation:
The violent-crime rate in a certain state of the country in that year was 1,496
The lower fence is 272.8 - 1.5 x 255.5 = -110.45 crimes per 100,000 population.
The upper fence is 528.3 + 1.5 x 255.5 = 911.55 crimes per 100,000 population.
Since violent-crime rate in this certain state of the country in that year is greater than the upper fence (1496>911.55), then it is an outlier.
(d) Do you believe that the distribution of violent-crime rates is skewed or symmetric?
The distribution of violent-crime rates is not symmetric, as there are extreme values in the tail, which tend to pull the mean in the direction of the tail to have data are either skewed left or skewed right, in this case it is skewed right, as there are large observations in the right tail that tend to increase the value of the mean, while having little effect on the median.
Lisa and Daisy work at a hair salon. The salon charges $21 for a hair styling session with Lisa and $17 for a session with Daisy.
Their income on a certain day is projected to be $357. This situation can be represented by the equation 21x + 17y = 357, where x is the number of Lisa's customers and y is the number of Daisy's customers.
(Technical details: x ≥ 0, y ≥ 0, and x and y take only integer values.)
How many customers would Lisa need to serve to attain the projected income if Daisy calls in sick that day?
Answer:
jursssursztsdigsdigssit
Step-by-step explanation:
hjnf
Answer: Lisa would need to serve 17 customers to attain the projected income.
Step-by-step explanation:
Their income on a certain day is projected to be $357.
This situation can be represented by the equation 21x + 17y = 357, where x is the number of Lisa's customers and y is the number of Daisy's customers.
On a day that Daisy is sick, the income from Daisy would be zero. For Lisa to attain the projected income of $357, the equation becomes
21x + 0 = 357
21x = 357
x = 357/21
x = 17
Multiple Choice Question The first cash flow at the end of Week 1 is $100, the second cash flow at the end of Month 2 is $100, and the third cash flow at the end of Year 3 is $100. This cash flow pattern is a(n) ______ type of cash flow.
20 POINTS!!!
What is the sum of the first six terms of the series?
48−12+3−0.75+...
The difference between terms is the previous term divided by 4:
48/4 = 12
12/4 =3
3/4 = 0.75
Find the next two terms:
0.75/4 = 0.1875
0.1875/4 = 0.046875
Now you have 48 - 12 + 3 - 0.75 + 0.1875 - 0.046875
Answer: 38.390625
1 Suppose you choose at random a real number X from the interval [2, 10]. (a) Find the density function f(x) and the probability of an event E for this experiment, where E is a subinterval [a, b] of [2, 10]. (b) From (a), find the probability that X > 5, that 5 < X < 7, and that X2 − 12X + 35 > 0.
Answer:
Step-by-step explanation:
Given that you choose at random a real number X from the interval [2, 10].
a) Since this is a contnuous interval with all number in between equally likely
E = probability for choosing a real number is U(2,10)
pdf of E is [tex]\frac{1}{8}[/tex]
b) P(X>5) = [tex]\int\limits^10_5 {1/8} \, dx = \frac{5}{8}[/tex]
[tex]P(5<x<7) = \frac{2}{8} =\frac{1}{4}[/tex]
For
[tex]x^2-12x+35 >0\\(x-5)(x-7)>0\\x<5 or x >7[/tex]
P(X<5 or x>7) = 1-P(5<x<7)
= [tex]\frac{3}{4}[/tex]
The density function of a real number selected randomly within the range [2,10] is 1/8, with the probability of an event being the difference between the two values divided by 8. The probabilities that X is greater than 5, lies between 5 and 7 and that the inequality X^2 - 12X + 35 > 0 always holds are 5/8, 1/4 and 1 respectively.
Explanation:The subject of this question is probability, particularly continuous uniform distribution. (a) A real number X selected from a certain interval [2, 10] has a continuous uniform distribution. Hence, the density function f(x) = 1/(b-a) = 1/8 for 2 ≤ x ≤ 10 and0otherwise. The probability of an event E, where E is [a,b], is the integral of f(x) from a to b, which is (b-a)/(10-2).
(b) Probability that X > 5 is the integral of f(x) from 5 to 10, which is (10-5)/8 = 5/8. Probability that 5 < X < 7 is the integral from 5 to 7, which is (7-5)/8 = 1/4. Lastly, the inequality X^2 - 12X + 35 > 0 factors out to (X-5)^2 + 10 > 0 which is always true as square number is always non-negative, thus the probability is 1.
Learn more about Probability here:https://brainly.com/question/22962752
#SPJ3
Orange juice, a raisin bagel, and a cup of coffee from kelly's koffee kart cost a total of $2.40. Kelly posts a notice announcing that, effective the following week, the price of orange juice will increase 50% and the price of bagels will increase 20%. After the increase, the same purchase will cost a total of $3.00, and the orange juice will cost twice as much as coffee. find the price of each.
A. What was the cost of a glass of orange juice before the increase?
B. what was the cost of a raisin bagel before the increase?
C. what was the cost of a cup of coffee before the increase?
Answer:
Juice $0.6
Bagel $1.5
Coffee $0.3
Step-by-step explanation:
The original price is $2.40 for an orange juice (x), raisin bagel (y) and a cup of coffee(z).
The prices of the orange juice will increase by 50%:
[tex]=x+0.5x=1.5x[/tex]
The price of bagels will increase by 20%:
[tex]=y+0.2x=1.2x[/tex]
The total price of everything is $3.00.
The orange juice will cost twice as much as coffee:
[tex]x=2z[/tex]
We have the following equations:
[tex]x+y+z=2.40[/tex]
[tex]1.5x+1.2y+z=3[/tex]
[tex]x=2z[/tex]
We have 3 equations and 3 unknowns:
Solve through substitution of x=2z into both equations:
[tex]1.5x+y=2.40[/tex]
[tex]2x+1.2y=3[/tex]
Therefore before increase. Use equation before increase to solve z and not x=2z because this is after the increase.
[tex]x=0.6[/tex]
[tex]y=1.5[/tex]
[tex]z=0.3[/tex]
The original prices were $1.00 for orange juice, $0.60 for a raisin bagel, and $0.80 for coffee.
Explanation:Let's denote the price of orange juice as O, the price of a raisin bagel as B, and the price of coffee as C.
Initially, we know that O + B + C = $2.40.
After the price increase, we know that (1.5O) + (1.2B) + C = $3.00 and also that 1.5O = 2C.
From the equation 1.5O = 2C, we deduce that O = 1.33C. We substitute this in the first equation to get the initial prices:
Orange juice (O) was $1.00 before the increaseRaisin bagel (B) was $0.60 before the increaseCoffee (C) was $0.80 before the increaseLearn more about Price Increase here:
https://brainly.com/question/31571622
#SPJ3
PLEASE HELP ASAP!!! I NEED CORRECT ANSWERS ONLY PLEASE!!!
Find m∠D.
Write your answer as an integer or as a decimal rounded to the nearest tenth.
m∠D = °
Answer:
26.57 degrees
Step-by-step explanation:
So we need to find the angle of D in your triangle.
Since this is a right triangle we can use trigonometric functions (sin, cos, tan etc)
For this we need to use tangent since wanna do opposite over adjacent.
But since we want the angle we use tan^-1
So plug into your calculator(make sure your calculator is in degrees): tan^-1 (4/8)
We get 26.565 degrees
Answer:
Step-by-step explanation:
Triangle BCD is a right angle triangle.
From the given right angle triangle,
BD represents the hypotenuse of the right angle triangle.
With m∠D as the reference angle,
CD represents the adjacent side of the right angle triangle.
BC represents the opposite side of the right angle triangle.
To determine m∠D, we would apply
the tangent trigonometric ratio.
Tan θ = opposite side/adjacent side. Therefore,
Tan D = 4/8 = 0.5
m∠D = Tan^-1(0.5)
m∠D = 26.6° to the nearest tenth.
Determine if the side lengths could form a triangle use an inquality to prove your answer
16m.. 21m.. 39m
Answer:
With side lengths 16 m, 21 m and 39 m a triangle cannot be formed.
Step-by-step explanation:
Given:
Sides of the triangle are given.
First side = 16 m
Second Side = 21 m
Third side = 39 m
We need to find whether the side length can form the triangle.
Solution:
Now we know that;
By Triangle In equality property which states that;
"The sum of length of any two side of triangle is greater than the length of the thirds side."
By applying the same in given data we get;
First Side + second side > Third side
[tex]16+21>39\\\\37>39[/tex]
which is false.
The first condition has failed itself.
So we can say that;
With side lengths 16 m, 21 m and 39 m a triangle cannot be formed.
The side lengths 16m, 21m, and 39m do not form a triangle as they do not satisfy the triangle inequality theorem, which states that for any three lengths to form a triangle, the sum of any two lengths must be greater than the third length.
Explanation:In mathematics, specifically in triangle geometry, the triangle inequality theorem states that for any given three sides, the lengths to form a triangle, the sum of the lengths of any two sides must be greater than the length of the third side. In other words, if a, b, and c are the lengths of the sides:
a + b > c
a + c > b
b + c > a
Our given side lengths are 16m, 21m, and 39m. Let's check if they satisfy the triangle inequality:
16m + 21m > 39m (Is 37m > 39m? No, 37m is less than 39m, thus the inequality is not satisfied)
Therefore, the given side lengths do not form a triangle.
Learn more about Triangle Inequality here:https://brainly.com/question/24078586
#SPJ11
An architect wants to do a rectangle with the diagonal of 25 inches the length of the rectangle is to be 3 inches more than triple the width. What is the dimensions she should make the rectangle
Answer: The length is 24 inches. The width is 7 inches.
Step-by-step explanation:
Let L represent the length of the rectangle.
Let W represent the width of the rectangle.
The length of the rectangle is to be 3 inches more than triple the width. This means that
L = 3W + 3
The diagonal of the rectangle divides it into two right angle triangles and the diagonal represents the hypotenuse. The length and width represents the opposite and adjacent side. Applying Pythagoras theorem,
Hypotenuse² = opposite side² + adjacent side²
Therefore,
25² = L² + W²
625 = L² + W² - - - - - - - - - -1
Substituting L = 3W into equation 1, it becomes
625 = (3W + 3)² + W²
625 = 9W² + 9W + 9W + 9 + W²
10W² + 18W - 625 + 9 = 0
10W² + 18W - 616 = 0
Dividing through by 2, it becomes
5W² + 9W - 308= 0
5W² + 44W - 35W - 308 = 0
W(5W + 44) - 7(5W + 44) = 0
W - 7 = 0 or 5W + 44 = 0
W = 7 or W = - 44/5
Since the width cannot be negative, then W = 7
L = 3W + 3 = 7 × 3 + 3
L = 24
A number was subtracted from 3. After which , that result was multiplied by 3. This result was then divided by 3 for a result of-5 . Given this information, what was the initial number ?
Answer:
8
Step-by-step explanation:
Sam is having a problem with rabbits getting into his vegetable garden, so he decides to fence it in. The length of the garden is 9 feet more than 6 times the width. He needs 74 feet of fencing to do the job. How many feet is the length of the garden?
Answer:
The length of the garden is 33 feet and the width of the garden is 4 feet.
Step-by-step explanation:
We are given the following in he question:
Perimeter of rectangular garden = 74 feet
Let l be the length of the garden and w be the width.
The length of the garden is 9 feet more than 6 times the width.
Thus, we can write
[tex]l = 9 + 6w\\\Rightarrow l-6w = 9[/tex]
Perimeter of rectangular garden =
[tex]2(l + w) = 74\\\Rightarrow l+w = 37[/tex]
Solving the two equation by elimination method, we get,
[tex]l-6w-(l+w) = 9 -37\\-7w = -28\\w = 4\\l = 9 + 6(4) = 33[/tex]
Thus, the length of the garden is 33 feet and the width of the garden is 4 feet.
Consider U = {x|x is a real number}.
A = {x|x ∈ U and x + 2 > 10}
B = {x|x ∈ U and 2x > 10}
Which pair of statements is true?
a. 5 ∉ A; 5 ∈ B
b. 6 ∈ A; 6 ∉ B
c. 8 ∉ A; 8 ∈ B
d. 9 ∈ A; 9 ∉ B
Answer:
Option c.
Step-by-step explanation:
We have the set of real numbers greater than 8 and B the set of real numbers greater than 5 here:
A: x+2>10 ⇒ x>8
B: 2x > 10 ⇒ x>5
8∉A ; 8∈B
Note: We can see (graph) that the intervals are open, so the corresponding points do not belong to their respective sets.
The price of an mp3 player is $149.99. The mp3 player was on sale for 20% off. Matt bought the mp3 player at the sale price and also had a rebate of $50. How much did Matt pay for the mp3 player?
Matt paid $70 for mp3 player.
Step-by-step explanation:
Given,
Cost of mp3 player = $149.99
Discount = 20%
Amount of discount = 20% of 149.99
Amount of discount = [tex]\frac{20}{100}*149.99[/tex]
Amount of discount = 0.2*149.99
Amount of discount = $29.99
Sale price = Cost of mp3 - Amount of discount
Sale price = [tex]149.99 - 29.99 = \$120[/tex]
Rebate = $50
Amount paid by Matt = sale price - rebate
Amount paid by Matt = 120-50 =$70
Matt paid $70 for mp3 player.
Keywords: subtraction, percentage
Learn more about subtraction at:
brainly.com/question/2821386brainly.com/question/2860697#LearnwithBrainly
Figure the standard deviation of the distribution of means for a population with a standard deviation of 20 and sample size of 10
Answer:
standard deviation of the distribution = 6.325.
Step-by-step explanation:
i) standard deviation of the population σ = 20
ii) size of sample n = 10.
iii) standard deviation of the distribution = [tex]\frac{\sigma}{\sqrt{n}} = \frac{20}{\sqrt{10}} = \frac{20}{3.162} = 6.325[/tex]
Final answer:
To find the standard deviation of the distribution of means for a population with a standard deviation of 20 and sample size of 10, use the formula: Standard Deviation of the Distribution of Means = Population Standard Deviation / Square Root of Sample Size. By substituting the values, you get the standard deviation of 6.32.
Explanation:
The standard deviation of the distribution of means for a population with a standard deviation of 20 and sample size of 10 is calculated using the formula:
Standard Deviation of the Distribution of Means = Population Standard Deviation / Square Root of Sample Size
Substitute the values: 20 / √10 = 6.32. Therefore, the standard deviation of the distribution of means is 6.32 for this scenario.
Simplify.
−4(3−1)+2 please
Answer: -6
Step-by-step explanation:
-4(3-1)+2
-12+4+2
-12+6
=-6
Hey there!
Just do PEMDAS
• Parentheses
• Exponents
• Multiplication
• Division
• Addition
• Subtraction
–4(3 – 1) + 2
= –4(2) + 2
= -–8 + 2
= –6
Therefore, your answer is: -6
Good luck on your assignment and enjoy your day!
~Amphitrite1040:)
Find the circumference, perimeter, and area.
For a semi-circle with diameter 10, the circumference is 5π, perimeter is 5π + 10, and area is 25/2π. For a circle with radius 6 and a 90-degree cut, remaining circumference is 9π, perimeter is 12π, and remaining area is 27π.
Semi-circle with Diameter 10:
a. Circumference:
The circumference of a circle is given by the formula C = π × d, where d is the diameter. For a semi-circle, it's half of the circumference of a full circle. Thus, C(semi-circle) = π × 10/2 = 5π.
b. Perimeter:
The perimeter of a shape is the sum of all its sides. For a semi-circle, it includes the curved boundary and the diameter. Therefore, P(semi-circle) = 5π + 10.
c. Area:
The area of a semi-circle is given by A(semi-circle) = 1/2 × π × r^2, where r is the radius. Substituting the given diameter, A(semi-circle) = 1/2 × π × (10/2)^2 = 25/2 × π.
Circle with Radius 6 and a 90-Degree Cut:
a. Circumference:
For the full circle, C(circle) = 2π × r = 2 × π × 6 = 12π. Since a 90-degree cut removes a quarter of the circle, the remaining circumference is C(remaining) = 3/4 × 12π = 9π.
b. Perimeter:
The perimeter includes the cut portion, so P(circle) = 12π.
c. Area:
The area of the circle is A(circle) = π × r^2 = π × 6^2 = 36π. With the cut, A(remaining) = 3/4 × 36π = 27π.
Using the piling method, which of the following can be constructed from polygons alone?
Check all that apply.
Answer:
B and C.
Step-by-step explanation:
A prism can be constructed from 4 sided polygons like a rectangle.
A pyramid (not including the vertex) can be constructed from squares of diminishing size.
The piling method allows for the construction of various three-dimensional shapes using polygons alone. Some of the shapes that can be constructed include prisms, pyramids, and cones.
Explanation:The piling method, also known as the additive method or stacking method, allows for the construction of various three-dimensional shapes using polygons alone. Some of the shapes that can be constructed include prisms, pyramids, and cones.
Prisms:
A prism is a three-dimensional shape with two congruent polygonal bases and rectangular lateral faces connecting the corresponding vertices of the bases. Examples of prisms include rectangular prisms (cuboids), triangular prisms, and hexagonal prisms.
Pyramids:
A pyramid is a three-dimensional shape with a polygonal base and triangular faces connecting the vertices of the base to a single point called the apex or vertex. Examples of pyramids include square pyramids, triangular pyramids, and pentagonal pyramids.
Cones:
A cone is a three-dimensional shape with a circular base and a curved surface that connects the base to a single point called the vertex. Cones can be constructed using polygons by approximating the curved surface with a series of smaller polygons.
Learn more about piling method using polygons here:https://brainly.com/question/12964632
#SPJ5
The mean value of land and building per acre from a sample of farms if 1400 with a standard deviation of 100. the data set has a bell shaped distribution. Assume thenumber of farms in the sample 80.
A. Use the empirical rule to estimate the number of farms whose land and buildings values per acre between 1200 and 1600
B. If 24 additional farms were sampled, about how many of these additional farms would you expect to have land and building values between 1200 per acre and 1600 per acre?
Answer:A)54 farms
B) 16 farms
Step-by-step explanation:
Y(1200) = (1200-1400)/100 = -200/100
Y(1200) = -2
Y(1600) = 1600-1400)/100
Y(1600) = 200/100 = 2
P(1200-1600) = (2y<-2)
2 standard deviation from the range = 68%=0.68
80 farms × 0.68 = 54 .4 approximately 54
B) 24× 0.68= 16.32 approximately 16
By using the empirical rule, it is expected that around 54 farms among the sample of 80 farms, as well as approximately 71 of 104 farms (after addition of 24 farms) will have land and building values per acre between 1300 and 1500.
Explanation:The question deals with the concept of mean, standard deviation, and the empirical rule, specifically in the context of data relating to the values of land and buildings per acre on various farms.
A. Using the empirical rule, we know that approximately 68% of the population of a bell-curve distribution lies within one standard deviation from the mean. In this case, the mean is 1400 and the standard deviation is 100. So, one standard deviation above and below the mean is between 1300 and 1500. Therefore, approximately 68% of the 80 farms, or roughly 54 farms, have land and building values per acre between 1300 and 1500.
B. If we add 24 more farms to the sample, the total number of farms will be 104. Applying the same empirical rule, we'd expect approximately 68% of these, roughly 71 farms, to have land and building values per acre between 1300 and 1500.
Learn more about Empirical Rule here:https://brainly.com/question/35669892
#SPJ3
The table shows the values of a function f(x).
What is the average rate of change of f(x) from −2 to 2?
Answer:
-4
Step-by-step explanation:
The average rate of change of a function f(x) between two points x = a and x=b is given by,
[tex]f(x)=\frac{f(b)-f(a)}{b-a}[/tex]
This can be understood with a simpler example, the straight line.
In this case, the rate of change of the 'function' is given by the slope,
[tex]m=\frac{f(x_{2})-f(x_{1})}{x_{2}-x_{1}}[/tex];
[tex](x_{1},f(x_{1})),(x_{2},f(x_{2}))[/tex] being two points on the straight line.
So, for the given problem,
a = -2
b = 2
Hence, average rate of change of [tex]f(x)=\frac{f(2)-f(-2)}{2-(-2)} =\frac{9-25}{2+2} =\frac{-16}{4} =-4[/tex]
Needing help with getting the slope
Answer:
The answer is 2/5
Step-by-step explanation:
I found 2 points and did y2-y1/ x2-x1 and got 2/5. And then I tested it and it worked.
Answer: the slope is 2/5
Step-by-step explanation:
The formula for determining slope is expressed as
Slope = change in value of y on the vertical axis / change in value of x on the horizontal axis
change in the value of y = y2 - y1
Change in value of x = x2 -x1
y2 = final value of y
y 1 = initial value of y
x2 = final value of x
x1 = initial value of x
Looking at the graph given,
y2 = 0
y1 = - 2
x2 = 5
x1 = 0
Slope = (0 - -2)/(0 - 0) = 2/5
The population of Greenville is currently 50,000 and declines at a rate of 1.2% every year. This models:
Answer:
Every year they are losing 600 people a year.
Step-by-step explanation:
You take 50,000/100= 500 x 1.2=600
Please help!!!
Find the area of the following figure: (Use π = 3.14 and do NOT include units in your answer.)
The composite shape's area is 61.12.
Step-by-step explanation:
Step 1; To calculate the value of the composite shapes area we first divide it into shapes whose areas we know. In this case, the composite shape consists of only a circle's half and a triangle attached below it. If we can sum the individual areas of the two shapes we should be able to determine the area of the unknown shape.
Step 2; The triangle has a base length of 8 as it is from (6, 10) to (14, 10) so 14 - 6 = 8 and the height is from (10,10) and (10,1) so the height is 10 -1 = 9. So the area of any given triangle is 0.5 times the product of its base length and height. So area of this triangle = 0.5 × 8 × 9 = 36. The circle is not an entire one but only half so we calculate the entire circle's area and then half it to find its area. The diameter is 8 as the circle's ends are at (6, 10) and (14, 10) and radius = 14 - 6 / 2 = 4. The area of any circle is π times the square of its radius. So area of this circle = π × r²/2= 3.14 × 4²/ 2 = 25.12.
Step 3; Now we calculate the given composite shapes area by summing the two areas i.e areas of the half-circle and the rectangle.
Area of the composite shape = 36 + 25.12 = 61.12.
Tires sell for $150 each and rims sell for $200. Three times as many tires were sold than rims. Total sales were $3,250. How many of each were sold? What were the total sales in dollars for each?
Number of tires that were sold is 15 and number of rims that were sold is 5. Total sales for tires is $2250 and total sales for rims is $1000
Step-by-step explanation:
Step 1:Given details are selling price of tires = $150, selling price of rims = $200 and total dales = $3250
Step 2:Form equation out of the given data. Let the number of rims that were sold be x. Then number of tires that were sold is 3x.
⇒ x × 200 + 3x × 150 = 3250
⇒ 200x + 450x = 3250
⇒ 650x = 3250
⇒ x = 5
Step 3:Find number of tires and rims that were sold.
⇒ Number of rims that were sold = x = 5
⇒ Number of tires that were sold = 3x = 15
Step 4:Find the total sales for each.
⇒ Total sales for rims = 5 × 200 = $1000
⇒ Total sales for tires = 15 × 150 = $2250
5 rims and 15 tires were sold with total sales of $1,000 for rims and $2,250 for tires.
Let x be the number of rims sold and 3x be the number of tires sold, since three times as many tires were sold as rims.
Now, we can create equations based on the given information.
The total sales for rims and tires are $3,250.
x = $3,250 / $650
3x = 3 * 5 = 15 (the number of tires sold)
Total sales for rims were $200 * 5 = $1,000, and total sales for tires were $150 * 15 = $2,250.
30 determine the coefficient on x 12 y 24 x12y24 in ( x 3 + 2 x y 2 + y + 3 ) 18 . (x3+2xy2+y+3)18. (be careful, as x x and y y now appear in multiple terms!)
Answer: Coefficient of x²y² =5184
Step-by-step explanation:
18(3x + 4xy + y +3)*18(3x + 4xy + y + 3)
324( 9x² +12x²y + 3xy + 9x + 12x²y + 16x²y² + 4xy² +12xy + 3xy + 4xy² + y² + + 3y + 9x +12xy + 3y +9)
Already, x12y24x12y24 = 82944x²y²
From the expansion above, we have that: 324*16x²y²= 5184x²y²
Since, 82944x²y²/5184x²y² = 16
∴ Coefficient = 5184
3 rectangular prisms have combined volume of 518 ft³ prism a has 1/3 of the volume of prism B and prisms B &C have equal volume what is the volume of each prism
Answer:
The answer to your question is A = 74 ft³, B = 222 ft³, C = 222ft³
Step-by-step explanation:
Data
Total volume = 518 ft³
Prism A volume = Prism B volume / 3
Prism B volume = Prism C volume
Process
Write an equation in terms of volume of B
Volume A + Volume B + Volume C = 518
Substitution
B/3 + B + B = 518
(B + 3B + 3B)/3 = 518
7B = 3(518)
7B = 1554
B = 1554/7
B = 222
Get the volumes
Volume A = 222/3
= 74
Volume B = 222
Volume C = 222
Architect Brian Peters spent 60% of a week's time working on drawings for a new apartment building. If Brian spent 18 hours working on projects other than the apartment building, compute the total hours worked
Answer:
Brian Peters worked for total of 45 hours.
Step-by-step explanation:
Let the total number of hours worked be 'x'.
Now Given:
Hours spent on other projects = 18 hours.
Also Given:
60% of a week's time working on drawings for a new apartment building.
Hours spent on new apartment building = [tex]60\%\times x = \frac{60}{100}x=0.6x[/tex]
We need to find the total hours worked.
Solution:
Now we can say that;
total number of hours worked is equal to sum of Hours spent on new apartment building and Hours spent on other projects.
framing in equation form we get;
[tex]x=0.6x+18[/tex]
Combining like terms we get;
[tex]x-0.6x=18\\\\x(1-0.6)=18\\\\0.4x=18[/tex]
Now Dividing both side by 0.4 we get;
[tex]\frac{0.4x}{0.4}=\frac{18}{0.4}\\\\x=45\ hrs[/tex]
Hence Brian Peters worked for total of 45 hours.
In the question, architect Brian Peters spent 60% of his total work time on a new apartment building and 40% on other projects. If those 40% equates to 18 hours, we can calculate his total work week as 45 hours by dividing 18 by 0.4.
Explanation:The problem can be solved by identifying that architect Brian Peters spent 65% of his time working on other projects than the new apartment building. This implies that he spent 40% of his time on the apartment building project. Understanding that a week consists of 168 hours, we could conduct a calculation to determine his total work hours. If we take that 60% was spent on the apartment building and 40% was spent on other projects, then those 18 hours represent 40% of his total work time. Therefore, to find his total work time, we can divide 18 (hours spent on other projects) by 40%, or 0.4.
So, the calculation will be: 18/0.4 = 45 hours. This shows that Brian Peters worked a total of 45 hours within the week for all his projects. These 45 hours involve the 18 hours he spent on other projects and the remaining time he dedicated to the new apartment building drawings.
Learn more about Percentage Calculation here:https://brainly.com/question/32197511
#SPJ3
Can u guys PLEASE answer this questions ASAP.
a) A dental patient was billed for two fillings and an X-ray. She paid $107.80 for each of the fillings. $74 for the X-ray and 10% GST on the total bill. How much was she charged altogether?