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bixtya [17]
3 years ago
14

Aubree has a points card for a movie theater.

Mathematics
2 answers:
Ray Of Light [21]3 years ago
8 0

Answer:

<h2>8 visits</h2>

Step-by-step explanation:

175 - 80 =

95 / 12.5 =

7.6

That means 8 trips

Hope that helps!

Elza [17]3 years ago
3 0

Answer:

8 visits

Step-by-step explanation:

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Estimate the minimum and maximum ages for typical textbooks currently used in college courses, then use the range rule of thumb
Maksim231197 [3]

Answer:

n=(\frac{1.64(4)}{0.25})^2 =688.537 \approx 689

So the answer for this case would be n=689 rounded up to the nearest integer

Step-by-step explanation:

Assuming this complete question: "Suppose that the minimum and maximum ages for typical textbooks currently used in college courses are 0 and 8 years. Use the range rule of thumb to estimate the standard deviation.

Estimate the minimum and maximum ages for typical textbooks currently used in college courses, then use the range rule of thumb to estimate the standard deviation. Next, find the size of the sample required to estimate the mean age (in years) of textbooks currently used in college courses. Use a 90% confidence level and assume that the sample mean will be in error by no more than 0.25 year."

Solution for the problem

First we need ti find the estimation for the standard deviation using the Rule of thumb, with the following formula:

s \approx \frac{R}{4}

Where R is the range defined as :

R = Max - Min = 8-0 = 8

So then the deviation would be approximately:

s \approx 4

Important concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error (ME) is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The margin of error is given by this formula:

ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}    (1)

And on this case we have that ME =\pm 0.25 and we are interested in order to find the value of n, if we solve n from equation (1) we got:

n=(\frac{z_{\alpha/2} \sigma}{ME})^2   (2)

We can assume that the estimator for the population deviation from the rule of thumb is \hat \sigma = s= 4

The critical value for 90% of confidence interval now can be founded using the normal distribution. And in excel we can use this formla to find it:"=-NORM.INV(0.05;0;1)", and we got z_{\alpha/2}=1.64, replacing into formula (2) we got:

n=(\frac{1.64(4)}{0.25})^2 =688.537 \approx 689

So the answer for this case would be n=689 rounded up to the nearest integer

6 0
3 years ago
Define perpendicular bisector
Maksim231197 [3]
My guess would be A, but I may be wrong
8 0
3 years ago
Read 2 more answers
Each peanut butter snack costs $2 each chocolate snack costs $3 how much does it cost to buy 6 peanut butter snacks and 8 chocol
Tatiana [17]
PB=$2
CS=$3
2x6=12
3x8=24
12+24=36
7 0
3 years ago
Lesson 7 module 4 grade 6 please help me
torisob [31]
Length of rectangle

Rectangle 1) 23m
Rectangle 2) 14yd

Width of rectangle

Rectangle 1) 36m
Rectangle 2) 3.5yd

An expressions is an equations but without the equal sign ( = ) and without the solution ( the answer)

The formula To find the area of a rectangle is

A = base * height
or
A = length * width

Rectangle’s area written in as an expression

Rectangle 1) 23 * 36
Rectangle 2) 14 * 3.5

To find the area, you multiply the numbers

23 * 36 = 828
14 * 3.5 = 49

Rectangle’s area written as a number

Rectangle 1) 828m
Rectangle 2) 49yd
6 0
3 years ago
Read 2 more answers
Solve each proportion x/6 = 3/8
mote1985 [20]

Answer:

x=\frac{9}{4}, 2\frac{1}{4} , or 2.25

Step-by-step explanation:

\frac{x}{6} =\frac{3}{8} \\\\8x=18\\x=\frac{18}{8} \\\\x=\frac{9}{4}

3 0
3 years ago
Read 2 more answers
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