Answer:
1727 students
Step-by-step explanation:
Here we have the formula for sample size given as
[tex]n = \frac{p(1-p)z^2}{ME^2}[/tex]
Where:
p = Mean
ME = Margin of error = 3
z = z score
Therefore, we have
p = 150/240 = 0.625
z at 99 % = 2.575
ME = [tex]\pm[/tex]3%
Therefore [tex]n = \frac{0.625(1-0.625)2.575^2}{0.03^2} = 1726.73[/tex]
The number of students Professor York have to sample to estimate the proportion of all Oxnard University students who watch more than 10 hours of television each week within ±3 percent with 99 percent confidence = 1727 students.
Ferris wheel has a diameter of 60 ft. How far will a rider travel during a 5 minute ride if the wheel rotates once every 15 seconds?
Answer:
3769.92 ft
Step-by-step explanation:
The diameter of the wheel, d= 60 ft
We know the perimeter of the wheel is,
= πd
= 3.1416*60
= 188.496 ft
Wheel travel for 5 minutes. So the wheel travel,
= 5*60
= 300 sec
The wheel rotates in every 15 seconds. So the wheel rotates,
= 300/15
= 20 times
In one rotation, the wheel travels its perimeter. so is 5 minutes it travels,
= 188.496*20
= 3769.92 ft
What is the probability of a rolling a sum of 10 when rolling two number cubes
Answer:
[tex]\frac{1}{12}[/tex]
Step-by-step explanation:
There are 36 total possible combinations with 2 number cubes. Only 3 of these combinations add up to 10 (4 and 6, 5 and 5, 6 and 4).
[tex]\frac{3}{36} =\frac{1}{12}[/tex], so the probability is [tex]\frac{1}{12}[/tex].
Answer:
1/12
Step-by-step explanation:
Which of the following is NOT true when testing a claim about a proportion? Choose the correct answer below. A. Both the traditional method and P-value method use the same standard deviation based on the claimed proportion p, but the confidence interval uses an estimated standard deviation based on the sample proportion ModifyingAbove p with caretp. B. When testing claims about population proportions, the traditional method and the P-value method are equivalent in the sense that they always yield the same result. C. A conclusion based on a confidence interval estimate will be the same as a conclusion based on a hypothesis test. D. If you want to test a claim about population proportions, use the P-value method or the classical method of hypothesis testing.
Answer: C. A conclusion based on a confidence interval estimate will be the same as a conclusion based on a hypothesis test.
Explanation: The One-Sample Proportion Test is used to assess whether a population proportion (P1) is significantly different from a hypothesized value (P0). This procedure calculates sample size and statistical power for testing a single proportion using either the exact test or other approximate z-tests.
To write a null hypothesis, first, start by asking a question. Rephrase that question in a form that assumes no relationship between the variables. In other words, assume a treatment has no effect. Write your hypothesis in a way that reflects this.
A null hypothesis is a hypothesis that says there is no statistical significance between the two variables. It is usually the hypothesis a researcher or experimenter will try to disprove or discredit. An alternative hypothesis is one that states there is a statistically significant relationship between two variables.
Between which two whole numbers is
√12?
Answer:
It lies between three and four.
Step-by-step explanation:
Answer:
First, find the square root of 12
√12=3.46410161514
Whole numbers are: 0,1,2,3,4,5...
So, the 2 whole numbers √12 lies between are 3 and 4
A video company randomly selected 100 of its subscribers and asked them how many hours of shows they watch per week. Of those surveyed, 45 watch more than 10 hours per week. Based on the data, if the company has 2500 subscribers, how many watch more than 10 hours per week?
Answer:
1,135 people
For every 100 people only 45 people watch more than 10 hours per week. So, the ratio is (45/100), since the company has 2500 we want to know what (x/2500) is. The total ratio becomes (1,135/2,500).
The number is found by dividing 2500 by 100 to receive the common factor of 25. You multiply 45 by 25 to receive your total answer.
Step-by-step explanation:
For every 100 people only 45 people watch more than 10 hours per week. So, the ratio is (45/100), since the company has 2500 we want to know what (x/2500) is. The total ratio becomes (1,135/2,500).
The number is found by dividing 2500 by 100 to receive the common factor of 25. You multiply 45 by 25 to receive your total answer.
Dr. Don offers a tutoring service for college students. He charges $40 as a fixed rate for the first hour plus $20 for each additional hour. What is the minimum and maximum number of hours of tutoring a student can get if he or she can afford to spend between $140 and $200? (Express your answer as an inequality)
Answer: 6 ≤ h ≤ 9
Step-by-step explanation:
Hi, since He charges $40 as a fixed rate for the first hour plus $20 for each additional hour, the cost of the tutoring service is equal to the fixed rate(40) plus, the product of the additional hours (h-1) and the cost per additional hour (20).
40+20(h-1)
40+20h-20
20+20h
Since a student can spend between $140 and $200, the previous expression must be greater o equal than 140, and less or equal than 200.
140≤20+20h≤200
Subtracting 20
140-20 ≤20-20+20h ≤200-20
120 ≤ 20h ≤ 180
Dividing by 20
120/20 ≤ 20h/20 ≤ 180/20
6 ≤ h ≤ 9
Final answer:
The minimum and maximum number of hours of tutoring a student can get if they can spend between $140 and $200 is 5 and 8 hours, respectively.
Explanation:
To determine the minimum and maximum number of hours of tutoring a student can get, we need to set up an inequality based on the pricing information provided. Let's denote the number of additional hours beyond the first hour as x.
The total cost of tutoring will be $40 for the first hour plus $20x for each additional hour. The student can afford to spend between $140 and $200, so the inequality is:
140 ≤ 40 + 20x ≤ 200
To find the solution, we need to isolate x. First, subtract 40 from all parts of the inequality:
100 ≤ 20x ≤ 160
Next, divide all parts of the inequality by 20:
5 ≤ x ≤ 8
Therefore, the minimum number of hours is 5 (including the first hour) and the maximum number of hours is 8 (including the first hour).
Rae and Doris are training to swim a 200-meter freestyle race. The table lists their practice times during training camp.
Rae’s Times(minutes)-2.12, 2.01, 2.46, 2, 2.22, 2.31, 2.23
doris times(minutes)-2.32, 2.19, 2.26, 2.03,
The median of Raes data is(drop down box answers, 2,2.03,2.14,2.22)minutes,and the median of doris data is(drop down box answers, 2,2.03,2.14,2.22)minutes. The interquartile range for rae is(drop down box answers, 0.01,0.13,0.26,0.30), and the interquartile range for doris is(drop down box answers, 0.02,0.06,0.18,0.19). The two data sets overlap(drop down box answers,very little, a lot).
Im wondering what are the answers for the drop down boxes,
and this based on statistics.
Answer:
24 boxes to drop down
Step-by-step explanation:
Answer:
I think
1st box:2.22
2nd box:2.14
3rd box:0.30
4th box:0.19
And the last one I’m not sure I just guessed ♂️
Step-by-step explanation:
write 7/128 as a percentage
Answer:
0.0546875 or if we are rounding 5.47%
Step-by-step explanation:
Answer:
5.46875%
Step-by-step explanation:
To answer this, we need to find 7 divided by 128. Using a calculator, we find that it is 0.0546875. To convert a decimal to a percentage, multiply the number by 100 and put a percent sign next to it. We get 5.46875%.
(x+7)(x+3) polynomial standard form
Answer:
[tex] {x}^{2} + 10x + 21[/tex]
Step-by-step explanation:
[tex](x + 7)(x + 3) \\ = x(x + 3) + 7(x + 3) \\ = {x}^{2} + 3x + 7x + 21 \\ \purple{ \bold{= {x}^{2} + 10x + 21}}[/tex]
activating prior knowledge what is a factor
Step-by-step explanation:
A factor is the number in a multiplication problem.
Select the possible values for x in the equation x2 = 108.
A.
[tex] \sqrt[ 36]{3} [/tex]
B.
[tex] \sqrt{18} [/tex]
c. 54
D.
[tex] \sqrt[6]{3} [/tex]
Answer:
D. 6√3.
Step-by-step explanation:
x^2 = 108
x = +/- √108
x = +/- √36 * √3
x = +/- 6√3
Samuel and Jason sell cans to a recycling center that pays $0.40 per pound of cans. The table shows the number of pounds of cans that they sold for several days.
Day Samuel's cans(lb) Jason's cans(lb)
Monday 17.4 10.4
Tuesday 13.3 11.3
Wednesday 10.4 7.2
Samuel wants to use his earnings from Monday and Tuesday to buy some batteries that cost $5.50 each. How many batteries can Samuel buy?
Samuel can buy batteries
Answer:
I believe 2 batteries
Step-by-step explanation:
17.4 pounds from monday + 13.3 from Tuesday= 30.7 pounds.
30.7 pounds times $0.40 is $12.28
12.28/5.5 is 2.327272727...
You cant buy .3 of a batter so the answer should be 2
NEED IT QUICK! THANK YOU At the start of an experiment, the temperature of a solution was Negative 12 degrees Celsius. During the experiment, the temperature of the solution rose 5 degrees Celsius each hour for 4 hours. Then the temperature changed by Negative 3 degrees Celsius and remained steady. What was the final temperature of the solution?
Negative 11 degrees Celsius
5 degrees Celsius
Negative 5 degrees Celsius
11 degrees Celsius
Answer:
5 degrees Celsius
Step-by-step explanation:
initial temperature = -12°C
temperature after 4 hours = -12°C + 4(5°C)
= -12°C + 20°C
= 8°C
final temperature = 8°C - 3°C
=5°C
Answer:
5 degrees celsius
Step-by-step explanation:
C
Find the perimeter of the rectangle. The drawing is not to scale.
29 ft
66 ft
Answer: 190
Step-by-step explanation: The perimeter is the measurement of every side. So multiply 29 by 2 To get 58 since there is two sides with that length. You'd then multiply 66 by 2 to get 132 For the same reason, and then finally add both of those together to get 190
f(n) = 45 • (4/5) ^n-1
The calculated common ratio of the sequence is 4/5
How to determine the common ratio of the sequence
From the question, we have the following parameters that can be used in our computation:
[tex]F(n) = 45 \cdot (\frac45)^{n - 1}[/tex]
By definition:
A geometric sequence is represented as
[tex]F(n) = ar^{n-1}[/tex]
Where, the common ratio is r
By comparison and using the above as a guide, we have the following:
r = 4/5
Hence, the common ratio of the sequence is 4/5
Question
A sequence is defined by F(n) = 45 • (4/5) ^n-1.
What is its common ratio
Someone answer urgent and if so I will mark brainliest
Answer:
(x, y) is transformed into (y, -x)
This is the last option (option I) in the list of possible answers.
Step-by-step explanation:
Notice the transformation in the point you picked: (-6,4), which from this coordinates change into the point (4,6) after the rotation about the origin.
Notice that the value "4" which was the original "y" value of the point, now became the "x" value for the transformed point.
So so far we have: (..., y) transformed into (y, ...)
now,notice that the value "-6" which was the original x=value for the point, after the transformation appeared in the new "y" position, and with the signed reversed (from -6 into +6), so it became the new x value but with opposite sign.
Then we can complete how the transformation can be represented:
(x, y) is transformed into (y, -x)
This is the last option (option I) in the list of possible answers.
Kerry writes a list of all the integers from 1 to n on a whiteboard. She uses the digit 0 five times and the digit 9 six times. What is the value of n?
The value of the number 'n' that has the digit 0 five times and the digit 9 six times will be 59.
What is Algebra?Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.
The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This approach is used to answer the problem correctly and completely.
Range of the number Times of '0' Time of '9'
1 - 9 0 1
10 - 19 1 1
20 - 29 1 1
30 - 39 1 1
40 - 49 1 1
50 - 59 1 1
Total 5 6
Then the value of the number 'n' that has the digit 0 five times and the digit 9 six times will be 59.
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96 is what percent of 60?
and please show your work thank you very much
Answer:
57.6
Step-by-step explanation:
60 x 0.96 = 57.6
hope this helps
What is the degree measure of x?
Answer:
134 degrees
Step-by-step explanation:
Because all triangles add up to 180 degrees, the missing degree inside the triangle would be 46 degrees. The 46 degrees are the missing side for the line and since all lines equal 180 degrees, 180 - 46 = 134
A butcher shop sells ground meat in 3/4 pounds packages. If the shop has 24 pounds of meat available to sell, how many packages of ground meat are for sale ?
32 packages of ground meat are for sale
What is Division?A division is a process of splitting a specific amount into equal parts.
Given that A butcher shop sells ground meat in 3/4 pounds packages
the shop has 24 pounds of meat available to sell,
We need to find the number of packages of ground meat are for sale .
To find this we have to divide 24 by 3/4
24/(3/4)
The denominator is multiplied to numerator by rationalising.
24×4/3
Twenty four times of fraction four by three.
32
Hence, 32 packages of ground meat are for sale
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There are 32 packages of ground meat for sale.
Explanation:To find the number of packages of ground meat for sale, we need to divide the total pounds of meat available by the weight of each package.
Given that each package weighs 3÷4 pounds and the shop has 24 pounds of meat available, we can divide 24 by 3÷4 to find the number of packages.
Dividing 24 by 3÷4 is the same as multiplying 24 by the reciprocal of 3÷4, which is 4÷3. Therefore, there are 24 × (4÷3) = 32 packages of ground meat for sale.
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Please use the following image below in order to answer the question:
Find the value of x.
What is the value of X?
Please show all of the work on how you got your answer. (Note: If you can't explain your work then that's completely fine. All I am asking for is the work shown with your answer)
Answer:
x = 11
Step-by-step explanation:
Consider the attached drawing. The central angle at C has the same measure as the arc: 125°. XYCZ is a quadrilateral, so has a sum of interior angles that is 360°. The interior angles are tangent points Y and Z are both 90°, so the remaining two angles are supplementary.
That is ...
(6x -11)° +125° = 180°
6x = 66 . . . . . . subtract 114
x = 11 . . . . . . . . .divide by 6
__
So, the things you need to know about this geometry are ...
tangents are 90° to the radius at the tangent pointthe sum of angles in a quadrilateral is 360°the measure of an arc is the same as that of its central angleIn short: the angle at X and the arc YZ are supplementary: they have a sum of 180°.
Answer:
11
Step-by-step explanation:
6x - 11 + 125 = 180
6x = 66
x = 11°
The difference of two times a number and eighteen is sixteen
Answer:
2n-18=16; n=17
Step-by-step explanation:
2n-18=16
+18 +18
2n= 34
/2 /2
n=17
Hope this helped
Ally slice 32 kg of watermelon for a party she divided the watermelon slices equally between 8 large bowls how many gams of watermelon did ally put in each bowl
4000 g
Step-by-step explanation:
32 kg means 32000 g of watermelon
divided into 8 bowls
grams of watermelon in each bowl are 32000÷8 = 4000 g
Ally put 4,000 grams of watermelon in each bowl.
Explanation:
To find out how many grams of watermelon Ally put in each bowl, we need to divide the total weight of the watermelon slices by the number of bowls. Ally sliced 32 kg of watermelon and divided it equally between 8 large bowls. To convert kg to grams, we multiply by 1000. So, the total weight of watermelon in grams is 32,000 grams. To find out how many grams of watermelon went into each bowl, we divide the total weight by the number of bowls: 32,000 grams / 8 bowls = 4,000 grams.
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Anyone care to help? :)
does 2,3,4 from a right triangle?
A cylindrical 2014-t6 aluminum alloy bar is subjected to compression-tension stress cycling along its axis; results of these tests are shown in fig. 1. if the bar diameter is 12.0 mm, calculate the maximum allowable load amplitude (in newtons) to ensure that fatigue failure will not occur at 107 cycles.
Complete part of Question:
Assume a factor of safety of 3.0
The Maximum stress versus logarithm of the number of cycles to fatigue failure curve for 2014-T6 Aluminium bar is attached to this solution
Answer:
The maximum allowable load amplitude is 6403.33 N
Step-by-step explanation:
diameter of the bar, d = 12 mm
d = 0.012 m
Cross sectional area of the bar, A = πd²/4
A = π*0.012²/4
A = 0.000113 m²
From the Maximum stress versus logarithm of the number of cycles to fatigue failure for 2014-T6 Aluminium bar attached to this solution;
At 10⁷ cycles, Maximum stress, S = 170 MPa
S = 170 * 10⁶ Pa
Factor of safety, N = 3.0
The tensile stress is given by the formula:
[tex]\sigma = S/N\\\sigma = \frac{170 * 10^{6} }{3} \\\sigma = 56.67 * 10^{6} N/m^{2}[/tex]
The tensile stress is also given by:
[tex]\sigma = F/A\\\sigma = F/0.000113[/tex]
F/0.000113 = 56.67 * 10⁶
F = 56.67 * 10⁶ * 0.000113
F = 6403.33 N
The maximum allowable load amplitude is 6403.33 N
Answer:
The maximum allowable load amplitude is 6408.85 Newtons
Step-by-step explanation:
Assume a factor of safety N = 3.0
From the graph attached, the maximum stress the cylindrical 2014-t6 aluminum alloy bar is subjected to is S = 170MPa
diameter d = 12.0 mm = 12*10^-3 m
area A
S = F/A
But A = (Π* d²)/4
S = 4F/(Π*d²)
By incorporating factor of safety N
S/N = 4F/(Π*d²)
F = SΠd²/4N
F = {170*10^6 *Π *(12*10^-3)}/4*3.0
F = 76906.19/12 = 6408.85 Newtons
Pls find the solution in the attached file for more explanation.
A set of data with 100 observations has a mean of 267. There are six outliners in the data set, which have a mean of 688 if the six outliners are removed, what is the mean of the new data set?
Answer:
272.04
Step-by-step explanation:
We must make a weighted average, as follows:
Each mean will have its weight, which would be the number of observations, therefore, the initial mean has a weight of 100.
And the final mean that we do not know its value but if its 94 (100 - 6) and the other mean that it is 688 and its weight is 6, we have the following equality:
100 * 297 = 688 * 6 + 94 * x
x would be the final mean, solving:
x = (29700 - 4128) / 94
x = 272.04
average after removing those 6 is 272.04
Three fair coins are flipped. What is the probability that at least 2 of them come up heads?
Answer:
The probability that atleast 2 of them come up heads is 0.5∴ P(A)=0.5Step-by-step explanation:
Given that three fair coins are flipped.
To find the probability that at least 2 of them come up heads:Sample space for the given event is
[tex]S={\{HHH, HHT, HTH, HTT, THH, THT, TTH, TTT}\}[/tex]
∴ n(S)=8Let A be the events of getting atleast 2 Heads and is given by
A = {HHH, HHT, HTH, THH}
∴ n(A)=4Probability of Getting atleast 2 Heads in 3 Coin Tosses is
[tex]P(A)=\frac{n(A)}{n(S)}[/tex]
[tex]P(A)=\frac{4}{8}[/tex]
[tex]=0.5[/tex]
∴ P(A)=0.5∴ the probability that atleast 2 of them come up heads is 0.5Which expressions represent the product of exactly two factors? Choose 2 answers: Choose 2 answers: (Choice A) A x+yx+yx, plus, y (Choice B) B 5(x+y)5(x+y)5, left parenthesis, x, plus, y, right parenthesis (Choice C) C (x+y)left parenthesis, x, minus, y, right parenthesis, left parenthesis, x, plus, y, right parenthesis (Choice D) D xy, y, z
Answer: B and C because I got it correct so trust me
Step-by-step explanation:
Ez
Consider the plot created from the residuals of a line of best fit for a set of data. A graph shows both axes unnumbered. Points show a downward trend. Does the residual plot show that the line of best fit is appropriate for the data? Yes, the points have no pattern. Yes, the points are evenly distributed about the x-axis. No, the points are in a linear pattern. No, the points are in a curved pattern.
Answer:
No, linear
Step-by-step explanation:
It's negative linear pattern
Answer: A. Yes, the points have no pattern.
Step-by-step explanation: Correct on edge2020, C linear is wrong trust me I did the Unit Test Review.