Answer:
The shark are fed [tex]\frac16 \ ton[/tex] of fish during the night.
Step-by-step explanation:
Given:
Weight of fish fed in the morning = [tex]\frac{2}{15}\ ton[/tex]
Also Given:
During the afternoon feeding the weight of fish fed will be 1/15 of a ton more than the fish fed during the morning.
Weight of fish fed in the afternoon = [tex]\frac{2}{15}+\frac{1}{15}=\frac{2+1}{15}=\frac{3}{15}\ ton[/tex]
Total fish fed in whole day = [tex]\frac12 \ ton[/tex]
We need to find the Weight of fish fed in the night.
Solution:
Now we can say that;
Weight of fish fed in the night can be calculated by by subtracting Weight of fish fed in the morning and Weight of fish fed in the afternoon from Total fish fed in whole day .
framing in equation form we get;
Weight of fish fed in the night = [tex]\frac{1}{2}-\frac{2}{15}-\frac{3}{15}= \frac{1}{2}-(\frac{2}{15}+\frac{3}{15})=\frac{1}{2}-\frac{2+3}{15}= \frac{1}{2}-\frac{5}{15} = \frac{1}{2}-\frac{1}{3}[/tex]
Now we will use LCM for making the denominator common we get;
Weight of fish fed in the night = [tex]\frac{1\times3}{2\times3}-\frac{1\times2}{3\times2} = \frac{3}{6}-\frac{2}{6}[/tex]
Now denominator are common so we will solve the numerators.
Weight of fish fed in the night = [tex]\frac{3-2}{6}=\frac16 \ ton[/tex]
Hence The shark are fed [tex]\frac16 \ ton[/tex] of fish during the night.
The expression 0.07x+(x−300) models the final price of a television set with an instant rebate in a state that charges a sales tax. The sales tax is on the original price.
Which expression represents the price of the television set after the instant rebate is applied but before the tax is applied?
Answer:
(x-300)
Step-by-step explanation:
Function Analysis
The model provided can be broken down into three parts: x is the original price of the television set before any changes were made on it. (x-300) is the price after the instant rebate was applied, and 0.07x is the sales tax (7%) charged by the state. Note this charge is applied on the original price.
Answer: (x-300) is price of the television set after the instant rebate is applied but before the tax is applied.
You are adding an addition to your patio. The area ( in square feet) of the addition can be represented by k² - 3k - 10.
a) The area of the patio before the addition was 50 square feet. Find it.
b) Find the area of the addition and the area of the entire patio after the addition.
Answer:
[tex]k^{2}-3k+40[/tex]
Step-by-step explanation:
We suppose;
A= area before addition
B= Area of addition [tex]k^{2}-3k-10[/tex]
a) As area of pation before addition is 50 - it means A= 50
b) Area of addition and the area of entire pation after addition = A+B
= 50 + [tex]k^{2}-3k-10[/tex]
=[tex]k^{2}-3k+40[/tex]
Answer:We suppose;
A= area before addition
B= Area of addition
a) As area of pation before addition is 50 - it means A= 50
b) Area of addition and the area of entire pation after addition = A+B
= 50 +
=
Evan cut a triangular piece of cloth to use in a quilt. The perimeter of the cloth is 934 cm. The base of the triangular cloth is 214cm. The remaining two sides are the same length.Choose Yes or No to tell if each expression models how to find the length of the other two sides of Evan's cloth.934−2s=214 114+2s=934 2s=934−214 2s−214=934
Answer:
934−2s=214; Yes
114+2s=934; No
2s=934−214; Yes
2s−214=934; No
Step-by-step explanation:
The base of the triangular cloth is 214cm. The remaining two sides are the same length.
Let s be the length of other sides.
Perimeter = Sum of all sides of a triangle.
[tex]Perimeter = s+s+214[/tex]
[tex]Perimeter =2s+214[/tex]
It is given that the perimeter of the triangular cloth is 934 cm.
[tex]2s+214=934[/tex] .... (1)
Equation (1) can be rewritten as
[tex]2s=934-214[/tex] and [tex]214=934-2s[/tex]
On solving we get
[tex]2s=720[/tex]
Divide both sides by 2.
[tex]s=360[/tex]
Therefore, the length of the other two sides of Evan's cloth is 360 cm.
SHOW YOUR WORK!! Identify the simplest polynomial function having integer coefficients with the given zeros: 3i, −1, 2
Answer:
[tex]p(x)=x^4-x^3+7x^2-9x-18[/tex]
Step-by-step explanation:
The given polynomial has roots 3i, −1, 2
Since [tex]3i[/tex] is a root [tex]-3i[/tex] is also a root.
The factored form of this polynomial is [tex]P(x)=(x-3i)(x+3i)(x+1)(x-2)[/tex]
We need to expand to get:
[tex]p(x)=(x^2-(3i)^2)(x^2-x-2)[/tex]
This becomes [tex]p(x)=(x^2+9)(x^2-x-2)[/tex]
We expand further to get:
[tex]p(x)=x^4-x^3+7x^2-9x-18[/tex]
The polynomial function is [tex]p (x) = x^4 - x^3 + 7x ^2 - 9x - 18[/tex]
The calculation is as follows;The factored form of the given polynomial should be
[tex]P(x) = (x - 3i) (x + 3i) (x + 1) (x - 2)[/tex]
Now we have to expand it
[tex]p(x) = (x^2 - (3i)^2) (x^2 - x - 2)\\\\= (x^2 + 9) (x^2 - x - 2)[/tex]
[tex]p (x) = x^4 - x^3 + 7x ^2 - 9x - 18[/tex]
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As a secondary mathematics teacher, Hernandez conducted a study that explored whether giving children recess prior to testing helped their test performance. For one of the semesters, he sends half of his classes out for 10 minutes of recess prior to testing for the other half, he provides 10 minutes of free time after the test. Which of the following best represents the design of Hernandez's study?
Full Question
As a secondary mathematics teacher, Hernandez conducted a study that explored whether giving children recess prior to testing helped their test performance. For one of the semesters, he sends half of his classes out for 10 minutes of recess prior to testing for the other half, he provides 10 minutes of free time after the test. Which of the following best represents the design of Hernandez's study?
a. One-shot case study
b. Post-test only control group
c. Solomon four group
d. Static-group comparison
Answer:
Static-Group Comparison
Explanation:
A Static-Group Comparison describes a study that involves two non-randomly selected groups, where one groups receive the treatment, and the other does not before the test. Afterwards, a post-test examination of the score is then carried out to examine the different in performance between both groups.
is 2 - 2 + 5x; 5x equivalent
Answer:
Yes
Step-by-step explanation:
The First section of the equation (2-2) cancel each other out and you are left with 5x=5x
Answer:
Yes
Step-by-step explanation:
Because In the equation we have 2-2+5x
2-2=0
So, 0+5x = 5x
For the staff breakfast on Friday Mr. Taylor purchased 5 cartons of eggs (a carton contains a dozen eggs). Je used 2 and 11/12 cartons for scrambled eggs and 1 and 1 and a 3rd cartons for breakfast burritos. How many eggs did he have left?
Answer: he has 9 eggs left.
Step-by-step explanation:
Mr. Taylor purchased 5 cartons of eggs and a carton contains a dozen eggs. A dozen of eggs is 12 eggs. It means that 5 cartons of eggs would contain
5 × 12 = 60 eggs
He used 2 and 11/12 cartons for scrambled eggs. Converting 2 11/12 into improper fraction, it becomes
35/12 cartons .
He used 1 and 1 and a 3rd cartons for breakfast burritos. Converting
1 1/3 into improper fraction, it becomes 4/3 cartons
Total number of cartons that he used would be
35/12 + 4/3 = (35 + 16)/12 = 51/12
The number of cartons left would be
5 - 51/12 = (60 - 51)/12 = 9/12
Since a carton has 12 eggs,
9/12 carton will have 9/12 × 12 = 9 eggs
A box of donuts has 12 total. One-fourth of the donuts have sprinkles. Of the remaining donuts, one-third have cherry filling. The rest are plain. How many plain donuts are in the box?
Answer:
13
Step-by-step explanation:
Trust me
The number of plain donuts in the box will be 6.
What is an expression?Expression in maths is defined as the collection of numbers variables and functions by using signs like addition, subtraction, multiplication, and division.
Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.
Given that a box of donuts has 12 total. One-fourth of the donuts have sprinkles. Of the remaining donuts, one-third have a cherry filling. The rest are plain.
The number of plain donuts will be calculated as below:-
Number = 12 - ( 12 /4) - ( 9 / 3 )
Number = 12 - 3- 3
Number = 12 - 6
Number = 6 plain donuts
Therefore, the number of plain donuts in the box will be 6.
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Follow the steps above, and find c, the total of the payments related to financing, and the monthly payment. A customer buys an automobile from you, the salesman. The price of the car, which includes taxes and license, amounts to $5,955.00. The customer wants to finance the car over 48 months after making a $500 down payment. You inform him that the true annual interest rate is 18%.
the monthly payment is approximately $163.06 and the total payments related to financing are approximately $7834.88.
To find the monthly payment and the total payments related to financing, we need to follow these steps:
1. Calculate the total amount financed.
2. Use the total amount financed to calculate the monthly payment using the formula for monthly payments on a fixed-rate loan.
3. Multiply the monthly payment by the number of months to find the total payments related to financing.
Given:
- Price of the car = $5955.00
- Down payment = $500.00
- Finance period = 48 months
- Annual interest rate [tex]\(= 18\%\)[/tex]
Step 1: Calculate the total amount financed.
The total amount financed is the difference between the price of the car and the down payment.
[tex]\[ \text{Total amount financed} = \text{Price of the car} - \text{Down payment} \][/tex]
[tex]\[ \text{Total amount financed} = \$5955.00 - \$500.00 \][/tex]
[tex]\[ \text{Total amount financed} = \$5455.00 \][/tex]
Step 2: Calculate the monthly payment.
To calculate the monthly payment, we use the formula for the monthly payment on a fixed-rate loan:
[tex]\[ M = \frac{P \times r \times (1 + r)^n}{(1 + r)^n - 1} \][/tex]
Where:
- M is the monthly payment
- P is the principal amount (total amount financed)
- r is the monthly interest rate (annual interest rate divided by 12)
- n is the number of payments (finance period in months)
First, we need to convert the annual interest rate to a monthly interest rate:
[tex]\[ r = \frac{18\%}{12} = 0.18 \times \frac{1}{12} = 0.015 \][/tex]
Now, we plug in the values:
[tex]\[ M = \frac{5455 \times 0.015 \times (1 + 0.015)^{48}}{(1 + 0.015)^{48} - 1} \][/tex]
[tex]\[ M ≈ \frac{5455 \times 0.015 \times (1.015)^{48}}{(1.015)^{48} - 1} \][/tex]
Using a calculator, we find that the monthly payment M is approximately $163.06.
Step 3: Calculate the total payments related to financing.
[tex]\[ \text{Total payments} = \text{Monthly payment} \times \text{Number of months} \][/tex]
[tex]\[ \text{Total payments} = \$163.06 \times 48 \][/tex]
[tex]\[ \text{Total payments} ≈ \$7834.88 \][/tex]
So, the monthly payment is approximately $163.06 and the total payments related to financing are approximately $7834.88.
Barry has 4 wooden identically shaped and sized blocks. 2 are blue, 1 is red and 1 is green. How many distinct ways can barry arrange the 4 blocks in a row? Barry's friend Billie is colour-blind and cannot distinguish between red and green. How many of Barry's distinct arrangements would Billie see different?
Answer:
Step-by-step explanation:
Distinct ways in which Barry can arrange the wooden shaped blocks is calculated from the permutation expression
4 permutation 3 =
P(n,r)=P(4,3) =4! ÷ (4−3)! = 24
Billie's distinct ways of seeing the arrangement would be 4 permutation 2
P(n,r)=P(4,2) =4! ÷ (4−2)! = 12
Answer:
The distinct arrangement Billie would see is P(n,r)=P(4,2) =4! ÷ (4−2)! = 12
Step-by-step explanation:
From the question, we recall the following:
Blue = 2, red =1 green =1
The way this can be solved for which Barry can arrange the wooden shaped blocks is applying the method called permutation
So,
4 permutation 3 = P(n,r)=P(4,3) =4! ÷ (4−3)! = 24
The ways Billie's would see the permutation arrangement is 4 permutation 2
With the expression given as
P(n,r)=P(4,2) =4! ÷ (4−2)! = 12
Chen has 17CDs. She gives 2 to her brother and buys 4 more. Her brother gives her 1 and she gives 3 to her best friend. How many CDs does Chen have now?
Answer: she has 17 CDs now.
Step-by-step explanation:
The total number of CDs that Chen had initially is 17.
She gives 2 to her brother. This means that she would be having
17 - 2 = 15
She buys 4 more. It means that she would be having
15 + 4 = 19
Her brother gives her 1. So the number that she has is
19 + 1 = 20
she gives 3 to her best friend. Therefore, the number of CDs that Chen has now is
20 - 3 = 17
Jill found a new fruit punch recipe that calls for orange juice and lemon-lime soda. If orange juice costs $3.60 per bottle and lemon-lime soda costs $1.80 per bottle and the recipe calls for 3 times as many bottles of lemon-lime soda as orange juice, at most how many bottles of orange juice can she buy if she only has $54.00?
Answer:
She can buy at most 6 bottles of orange juice.
Step-by-step explanation:
Consider the provided information.
The recipe calls for 3 times as many bottles of lemon-lime soda as orange juice,
Let she buy x bottles of orange juice.
According to question: Lemon lime soda = 3x
Orange juice costs $3.60 per bottle and lemon-lime soda costs $1.80 per bottle. She only has $54.00
[tex]3.60x+1.80(3x)=54[/tex]
[tex]3.60x+5.4x=54[/tex]
[tex]9x=54[/tex]
[tex]x=6[/tex]
Hence, she can buy at most 6 bottles of orange juice.
Jill can buy at most 6 bottles of orange juice.
Explanation:To find out how many bottles of orange juice Jill can buy, we need to determine the cost of the orange juice and the cost of the lemon-lime soda based on the given prices. Let's assume she can buy 'x' bottles of orange juice. Since the recipe calls for 3 times as many bottles of lemon-lime soda, she can buy 3x bottles of lemon-lime soda. The total cost of the orange juice and the lemon-lime soda must not exceed $54.00.
The cost of the orange juice is $3.60 per bottle, so the cost of 'x' bottles of orange juice is 3.60x dollars. The cost of the lemon-lime soda is $1.80 per bottle, so the cost of 3x bottles of lemon-lime soda is 1.80 * 3x = 5.40x dollars.
To find the maximum number of bottles of orange juice she can buy, we need to solve the inequality:
3.60x + 5.40x ≤ 54.00
Combining like terms, we have:
9.00x ≤ 54.00
Dividing both sides of the inequality by 9.00, we get:
x ≤ 6
Jill can buy at most 6 bottles of orange juice.
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a scale drawing of a rectangle is made by using a scale factor of 5/8. the original and the scale drawing are shown below. which method can be used to find the dimensions of the original rectangle
Answer:
L_original = 28.8 in
H_original = 19.2 in
Step-by-step explanation:
Given:
- Length of scaled rectangle L_scale = 18 in
- width of the scaled rectangle H_scale= 12 in
- Scale factor = (5/8)
Find:
-Which method can be used to find the dimensions of the original rectangle
Solution:
- The best way to determine the original dimensions of the rectangle is by ratios. We have the scale factor as (5/8). so we can express:
L_scale = (5/8)*L_original
L_original = L_scale*(8/5)
L_original = 18*(8/5) = 28.8 in
H_scale = (5/8)*H_original
H_original = H_scale*(8/5)
H_original = 12*(8/5) = 19.2 in
- Hence, the original dimensions are:
L_original = 28.8 in
H_original = 19.2 in
Answer:
B. [tex]18 / \frac{5}{8}= 28\frac{4}{5}[/tex] [tex]inches[/tex] [tex]and[/tex] [tex]12 /\frac{5}{8} = 19\frac{1}{5}[/tex] [tex]inches[/tex]
Step-by-step explanation:
A theatre sold a total of 98 adult and senior tickets. Adult tickets sold for 12$ each and senior tickets sold for 8$ each bringing in a total of 1,072$. How many adult tickets were sold
Answer: 72 adult tickets were sold.
Step-by-step explanation:
Let x represent the number of adult tickets that were sold.
Let y represent the number of senior tickets that were sold.
A theatre sold a total of 98 adult and senior tickets. It means that
x + y = 98
x = 98 - y - - - - - - - - - - - - -1
Adult tickets sold for 12$ each and senior tickets sold for 8$ each bringing in a total of 1,072$. This means that
12x + 8y = 1072 - - - - - - - - - - - 2
Substituting equation 1 into equation 2, it becomes
12(98 - y) + 8y = 1072
1176 - 12y + 8y = 1072
- 12y + 8y = 1072 - 1176
- 4y = - 104
y = - 104/ - 4
y = 26
Substituting y = 26 into equation 1, it becomes
x = 98 - 26 = 72
A concrete mixer is in volume proportions of 1 part cement, 2 parts water, 2 parts aggregate, and 3 parts sand. How many cubic feet of each ingredient are needed to make 54cu ft of concrete?
Answer:
Step-by-step explanation:
The total volume of cement in cubic feet to be made is 54 cu ft.
A concrete mixer is in volume proportions of 1 part cement, 2 parts water, 2 parts aggregate, and 3 parts sand. This means that the ratio of the ingredients is
1 : 2 : 2 : 3
Total ratio = 1 + 2 + 2 + 3 = 8
Therefore,
Volume of cement needed would be
1/8 × 54 = 6.75 cubic feet
Volume of water needed would be
2/8 × 54 = 13.5 cubic feet
Volume of aggregate needed would be
2/8 × 54 = 13.5 cubic feet
Volume of sand needed would be
3/8 × 54 = 20.25 cubic feet
At a corner gas station, the revenue R varies directly with the number g of gallons of gasoline sold. If the revenue is $56.40 when the number of gallons sold is 12, find a linear equation that relates revenue R to the number g of gallons of gasoline. Then find the revenue R when the number of gallons of gasoline sold is 7.5.
Answer:
(i) R = 4.70g
(ii) R = $35.25
Step-by-step explanation:
(i) R ∞ g
Removing the proportionality symbol, we have
R = kg, where k is the constant of proportion
56.40 = k(12)
Divide both sides by 12
56.40/12 = k(12)/12
$4.70 = k
k = $4.70
So, R = 4.70g (which is the linear equation relating Revenue, R to number of gallons, g)
(ii) When g = 7.5,
R = 4.70 * 7.5 = 35.25
R = $35.25
The revenue R at a gas station varies directly with the number of gallons of gasoline sold g. The linear equation relating R to g is R = 4.7g. The revenue when the number of gallons sold is 7.5 is $35.25.
Explanation:
In this particular scenario, we're dealing with a problem of direct variation. In a direct variation, as one quantity increases, the other increases proportionally. This can be represented by a linear equation of the form y = kx, where y is the dependent variable, x is the independent variable, and k is the constant of variation (the ratio of y to x).
Here, the Revenue (R) varies directly with the number of gallons of gasoline sold (g). We can calculate the constant of variation (k) by dividing the given Revenue (R) by the given number of gallons (g): k = 56.4 ÷ 12 = 4.7. So, the linear equation relating R to g is: R = 4.7g.
To find the revenue R when the number of gallons of gasoline sold is 7.5, substitute g = 7.5 into the equation: R = 4.7 * 7.5 = $35.25
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Melanie bought bags of colored sand that each cost the same. She spent a total of $24. Find three possible costs per bag and the number of bags that she could have purchased
Answer:
Step-by-step explanation:
Factors of 24 are 1,2,3,4,6,8,12,24
Since we are looking for prices as well as quantity, these numbers must go in pairs.
1*24 = option 1
2*12 = option 2
3*8 = option 3
4*6 = option 4
Any of the above 4 pairs can suit the figures. They can even be reversed except option 1 ($1 and 24 bags but not $24 and 1 bag because the question says bags not bag).
The 68-95-99.7 rule tells us how to find the middle 68%, 95% or 99.7% of a normal distribution. suppose we wanted to find numbers a and b so that the middle 80% of a standard normal distribution lies between a and b where a is less than
b. one of the answers below are not true of a and
b. mark the answer that is not true.
Answer:
The values of a and b are -1.28 and 1.28 respectively.
Step-by-step explanation:
It is provided that the area of the standard normal distribution between a and b is 80%.
Also it is provided that a < b.
Let us suppose that a = -z and b = z.
Then the probability statement is
[tex]P (a<Z<b)=0.80\\P(-z<Z<z)=0.80[/tex]
Simplify the probability statement as follows:
[tex]P(-z<Z<z)=0.80\\P(Z<z)-P(Z<-z)=0.80\\P(Z<z)-[1-P(Z<z)]=0.80\\2P(Z<z)-1=0.80\\P(Z<z) = \frac{1.80}{2}\\P(Z<z) =0.90[/tex]
Use the standard normal distribution table to determine the value of z.
Then the value of z for probability 0.90 is 1.28.
Thus, the value of a and b are:
[tex]a = -z = - 1.28\\b = z = 1.28[/tex]
Thus, [tex]P(-1.28<Z<1.28)=0.80[/tex].
Phoebe runs at 12km/h and walks at 5km/h. One afternoon she ran and walked a total of 17km. If she ran for the same length of time as she walked for how long did she run
If correct, it should be one hour. Maybe try and solve it yourself to see if this makes sense
Step-by-step explanation:
Assume the total trip that afternoon took t hours
12(t/2) + 5(t/2) = 17 => t = 2
So she ran for 1 hour.
What is the slope intercept form of the equation y+18=2(x-1)
Step-by-step explanation:
Given,
The equation y + 18 = 2( x - 1)
To write the given equation in the slope intercept form = ?
∴ The equation y + 18 = 2( x - 1)
⇒ y + 18 = 2x - 2
⇒ y = 2x - 2 - 18
⇒ y = 2x - 20
⇒ y = 2x + ( - 20) ..... (1)
We know that,
The equation of slope intercept form,
y = mx + c
Where, m is the sope and c is the y-intercept
∴ The slope intercept form of the given equation is: y = 2x + ( - 20)
Renting a car cost 30dollars a day, or 600 per month. Renting daily is cheaper for a few days, but after how many days are the two options equal. (After which renting is cheaper)
Answer: The two options are equal after 20days of daily pay.
Step-by-step explanation:
If it cost $30 to rent a car for a day and $600 to rent the same car for a month(approximately 30days), renting daily is equal to the monthly rentage after 20 days ($30 for 20days which is $30×20 i.e $600)
According to the deduction above, the renting is cheaper daily only for the first 20 days after which the amount equals to the monthly rentage of the same car.
Answer:
20 days.
Step-by-step explanation:
Assume, 1 month = 30 days.
Options:
i. $600 per month
$600/month * 1 month/30 day
= $20 per day.
ii. $30/day.
Renting daily is equal to the monthly rent after 20 days ($30 for 20days which is $30×20 i.e $600)
That is, the renting is cheaper daily only for the first 20 days after which it is equal to the monthly rent.
Two hikers are 33 miles apart and walking towards each other. They meet in 10 hours. Find the rate of each Hiker if one joker walks 1.1 mph fast than the other
Answer:
Step-by-step explanation:
Let x represent the rate of the first hiker.
if one hiker walks 1.1 mph fast than the other, it means that the rate of the second hiker would be x + 1.1
Two hikers are 33 miles apart and walking towards each other. They meet in 10 hours. This means that in 10 hours, both hikers travelled a total distance of 33 miles.
Distance = speed × time
Distance covered by the first hiker in 10 hours would be
x × 10 = 10x
Distance covered by the second hiker in 10 hours would be
10(x + 1.1) = 10x + 11
Since the total distance covered by both hikers is 33 miles, then
10x + 10x + 11 = 33
20x + 11 = 33
20x = 33 - 11 = 22
x = 22/20 = 1.1 miles per hour
The rate of the second hiker would be
1.1 + 1.1 = 2.2 miles per hour.
Rewrite as a combination of multiple logarithms:
log_8 (10xy^3)
Answer:
The answer to your question is letter B. log₈10 + log₈x + 3log₈y
Step-by-step explanation:
Just remember the properties of logarithms
- The logarithm of a product is the sum of logarithms.
- The logarithm of a power is equal to the power times the log.
Then
log₈(10xy³) = log₈ 10 + log₈x + log₈y³
and finally
log₈10 + log₈x + 3log₈y
In a sample of 258 individuals selected randomly from a city of 750,339 people, 165 were found to be supportive of a new public works project. Find the 99.9% confidence interval for the support level percentage in the entire city
Answer: (54.13%, 53.83%)
Step-by-step explanation:
Confidence interval for population proportion is given by :-
[tex]\hat{p}\pm z^*\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}[/tex]
[tex]\hat{p}[/tex] = sample proportion
n= sample size.
z* = critical z-value.
Let p be the proportion of individuals supportive of a new public works project.
As per given , we have
n= 258
[tex]\hat{p}=\dfrac{165}{258}\approx0.64[/tex]
For 99.9% confidence , significance level α= 0.001
Critical z-value for 99.9% confidence interval =[tex]z_{\alpha/2}=z_{0.001/2}=z_{0.0005}=3.29[/tex] [By z-table]
Then, the 99.9% confidence interval for the support level percentage in the entire city will be :
[tex]0.64\pm (3.29)\sqrt{\dfrac{0.64(1-0.64)}{258}}\\\\\approx 0.64\pm0.0983\\\\=(0.64-0.0983,\ 0.64+0.0983) = (0.5417,\ 0.7383= (54.13\%,\ 53.83\%)[/tex]
Hence, the 99.9% confidence interval for the support level percentage in the entire city is (54.13%, 53.83%) .
Determine the models that could represent a compound interest account that is growing exponentially.
Select all the correct answers.
A(t) = 2,675(1.003)12t
A(t) = 4,170(1.04)t
A(t) = 3,500(0.997)4t
A(t) = 5,750(1.0024)2t
A(t) = 1,500(0.998)12t
A(t) = 2,950(0.999)t
Answer:A(t)= 2,675(1.003)12t
A(t)=4170(1.04)t
A(t)=5750(1.0024)2t
Step-by-step explanation:Exponential growth is also called growth percentage.
It is calculated using 100% of the original amount plus the growth rate . Example if the amount grows by 5% yearly.5%=0.05
It is written thus(1+0.005)=1.05.
It is usually written in decimal.
The formular for compound interest that is growing exponentially is written as
A=P (1 + i)^N
Looking at the 5 A(t) equations,only 3 of it are growing exponentially.
If the last digit of weight measurement is equally likely to be any of the digits 0 through 9. Round your answers to one decimal place (e.g. 98.7). What is the probability that the last digit is 0?
Answer:Probability that the last digit is 0=0.1
Step-by-step explanation:
The likely digits for the last digits runs from 0 through 9 giving a total of 10 digits
The fore P(last digit to be 0) = 1/10 = 0.1
If the last digit of a weight measurement rounded to the nearest tenth place is equally likely to be any of the digits from 0 through 9, then the probability that the last digit is 0 is 0.1 or 10%.
Explanation:The question is asking about the probability that the last digit in a weight measurement, rounded to one decimal place, is 0. Given that the last digit is equally likely to be any digits from 0 through 9, this is a basic probability problem with each outcome being equally likely.
Since there are 10 possible results (the digits 0 through 9), and we are interested in only 1 of these results (the digit 0), the probability can be calculated as 1 divided by 10. Therefore, the probability that the last digit is 0 is 0.1 or 10%.
This is a standard concept in an introductory probability course and is a fundamental idea that will be used in more complex probability problems.
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Factor the expression. x2 – x – 42 (x – 7)(x – 6) (x – 7)(x + 6) (x + 7)(x – 6) (x + 7)(x + 6)
Answer:
(x - 7)x + 6).
Step-by-step explanation:
x^2 – x – 42
6 * -7 = 42 and 6 - 7 = -1 so the factors are:
(x - 7)x + 6).
The factor form of the expression x² - x - 42 is (x - 7)(x + 6).
To factor the expression x² - x - 42, we need to find two binomial factors that, when multiplied together, give us the original expression.
We can start by looking for two numbers that multiply to -42 and add up to -1, which is the coefficient of the x term in the expression.
The pair of numbers that satisfy these conditions are -7 and 6.
If we multiply these two numbers, we get -42, and if we add them, we get -1.
Therefore, we can write the expression as:
x² - x - 42
= (x - 7)(x + 6)
This means that the original expression can be factored as the product of two binomials: (x - 7) and (x + 6).
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The first four terms of an arithmetic sequence are given.
27, 32, 37, 42, ...
What is the 60th term of the sequence?
Answer:
[tex]a_6_0=322[/tex]
Step-by-step explanation:
we know that
The rule to calculate the an term in an arithmetic sequence is
[tex]a_n=a_1+d(n-1)[/tex]
where
d is the common difference
a_1 is the first term
we have that
[tex]a_1=27\\a_2=32\\a_3=37\\a_4=42[/tex]
[tex]a_2-a_1=32-27=5[/tex]
[tex]a_3-a_2=37-32=5[/tex]
so
The common difference is d=5
[tex]a_4-a_3=42-37=5[/tex]
Find 60th term of the sequence
[tex]a_n=a_1+d(n-1)[/tex]
we have
[tex]a_1=27\\d=5\\n=60[/tex]
substitute
[tex]a_6_0=27+5(60-1)[/tex]
[tex]a_6_0=27+5(59)[/tex]
[tex]a_6_0=322[/tex]
The 60th term of the sequence should be 322 when the first four terms should be given.
Calculation of the 60th term of the sequence:Since
a1 = 27
a2 = 32
a3 = 37
And, a4 = 42
So,
= 27 + 5(60 - 1)
= 27 + 5(59)
= 322
hence, The 60th term of the sequence should be 322 when the first four terms should be given.
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the sum of three consecutive number is 114. what is the smallest of the three numbers?
Answer:
37
Step-by-step explanation:
37+38+39
Answer: the smallest of the three numbers is 37
Step-by-step explanation:
Let x represent the smallest number.
Since the three numbers are consecutive, it means that the next number would be x + 1
Also, the last and also the largest number would be x + 2
If the sum of the three consecutive numbers is 114, it means that
x + x + 1 + x + 2 = 114
3x + 3 = 114
Subtracting 3 from the Left hand side and the right hand side of the equation, it becomes
3x + 3 - 3 = 114 - 3
3x = 111
Dividing the Left hand side and the right hand side of the equation by 3, it becomes
3x/3 = 111/3
x = 37
To find the equation of a line, we need the slope of the line and a point on the line. Since we are requested to find the equation of the tangent line at the point (4, 2), we know that (4, 2) is a point on the line. So we just need to find its slope. The slope of a tangent line to f(x) at x = a can be found using the formula
Answer:
[tex]x-4y+4=0[/tex]
[tex]f(x)=\sqrt x[/tex] and x=4
Step-by-step explanation:
We are given that a curve
[tex]y=\sqrt x[/tex]
We have to find the equation of tangent at point (4,2) on the given curve.
Let y=f(x)
Differentiate w.r.t x
[tex]f'(x)=\frac{dy}{dx}=\frac{1}{2\sqrt x}[/tex]
By using the formula [tex]\frac{d(\sqrt x)}{dx}=\frac{1}{2\sqrt x}[/tex]
Substitute x=4
Slope of tangent
[tex]m=f'(x)=\frac{1}{2\sqrt 4}=\frac{1}{2\times 2}=\frac{1}{4}[/tex]
In given question
[tex]m=\lim_{x\rightarrow a}\frac{f(x)-f(a)}{x-a}[/tex]
[tex]\frac{1}{4}=\lim_{x\rightarrow 4}\frac{f(x)-f(4)}{x-4}[/tex]
By comparing we get a=4
Point-slope form
[tex]y-y_1=m(x-x_1)[/tex]
Using the formula
The equation of tangent at point (4,2)
[tex]y-2=\frac{1}{4}(x-4)[/tex]
[tex]4y-8=x-4[/tex]
[tex]x-4y-4+8=0[/tex]
[tex]x-4y+4=0[/tex]
The equation of the tangent line of a function at a particular point can be found by using the formula y - y1 = m(x - x1), where the slope m is the derivative of the function at the specific point. In this case, find the derivative at x = 4 and substitute into the formula along with the point (4,2).
Explanation:To find the equation of the tangent line of a function at a particular point, we can indeed utilise the slope-point form of a straight line equation, which is y - y1 = m (x - x1). In this case the point on the line is (4,2).
However regarding the slope, it is calculated as the derivative of the function f(x) at the point x = a.
Let us assume the function f(x). The derivative f '(x), also known as the slope of the tangent line at any point x, is found by taking the derivative of f(x). So to find the slope at x = 4, you would calculate f '(4).
Substitute the value of the derivative at the point (4,2) which represents our m(slope), x1=4 and y1=2 into the linear equation y - y1 = m(x - x1) to generate the equation of the tangent line.
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