1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
RideAnS [48]
2 years ago
14

7 in. 5 in. 7 in. 5 in. The perimeter?

Mathematics
2 answers:
lana66690 [7]2 years ago
7 0

Answer:

The perimeter is:

24

Step-by-step explanation:

Perimeter is the outside frame of the area. Add the dimensions together to get your answer. Adding:

7+7= 14

5+5= 10

10+14= 24

:) Hope this helps have a wonderful day!

mestny [16]2 years ago
5 0
24

7•2=14
5•2=10
14+10=24
You might be interested in
Which expression is equivalent 3m+1-m? <br> 2+ m-1+m<br> 1+m<br> 3m-1<br> 3m
Papessa [141]

Answer:

2+ m-1+m..............

7 0
3 years ago
Power +, Inc. produces AA batteries used in remote-controlled toy cars. The mean life of these batteries follows the normal prob
Novay_Z [31]

Answer:

a) By the Central Limit Theorem, it is approximately normal.

b) The standard error of the distribution of the sample mean is 1.8333.

c) 0.1379 = 13.79% of the samples will have a mean useful life of more than 38 hours.

d) 0.7939 = 79.39% of the samples will have a mean useful life greater than 34.5 hours

e) 0.656 = 65.6% of the samples will have a mean useful life between 34.5 and 38 hours

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Mean of 36 hours and a standard deviation of 5.5 hours.

This means that \mu = 36, \sigma = 5.5

a. What can you say about the shape of the distribution of the sample mean?

By the Central Limit Theorem, it is approximately normal.

b. What is the standard error of the distribution of the sample mean? (Round your answer to 4 decimal places.)

Sample of 9 means that n = 9. So

s = \frac{\sigma}{\sqrt{n}} = \frac{5.5}{\sqrt{9}} = 1.8333

The standard error of the distribution of the sample mean is 1.8333.

c. What proportion of the samples will have a mean useful life of more than 38 hours?

This is 1 subtracted by the pvalue of Z when X = 38. So

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{38 - 36}{1.8333}

Z = 1.09

Z = 1.09 has a pvalue of 0.8621

1 - 0.8621 = 0.1379

0.1379 = 13.79% of the samples will have a mean useful life of more than 38 hours.

d. What proportion of the sample will have a mean useful life greater than 34.5 hours?

This is 1 subtracted by the pvalue of Z when X = 34.5. So

Z = \frac{X - \mu}{s}

Z = \frac{34.5 - 36}{1.8333}

Z = -0.82

Z = -0.82 has a pvalue of 0.2061.

1 - 0.2061 = 0.7939

0.7939 = 79.39% of the samples will have a mean useful life greater than 34.5 hours.

e. What proportion of the sample will have a mean useful life between 34.5 and 38 hours?

pvalue of Z when X = 38 subtracted by the pvalue of Z when X = 34.5. So

0.8621 - 0.2061 = 0.656

0.656 = 65.6% of the samples will have a mean useful life between 34.5 and 38 hours

4 0
3 years ago
Which method would determine the volume of the prism with dimensions 2x2x4 shown below?
malfutka [58]
+16 will give the volume
2x2=4
4x4=16
8 0
3 years ago
Use mathematical induction to prove that the statement is true for every positive integer n.
Natali [406]

Answer:

3x-4v

it is because of me

3 0
3 years ago
Rico made a function table to illustrate the rate he charges for mowing lawns. Complete the table. Then write a function rule fo
Lesechka [4]
I think the correct answer is C. i hope this helps

7 0
3 years ago
Other questions:
  • What is the relationship between 4x + 6y = 12 and 2x + 3y = 6 ?
    15·2 answers
  • Lily buys a sweater that is on sale for $42, which is 75% of the original price of the sweater. What was the original price of t
    11·1 answer
  • Estimate the domain
    10·2 answers
  • A line passes through the point (-8, 4) and has a slope of - 5/4.
    15·2 answers
  • The test scores for last week's History test were: 76, 100, 94, 90, 68, 90, 80, 92, 84 If test scores of 60 and 68 are added to
    9·2 answers
  • Which expression is equivalent to 4 square root 6 divided by 3 root 2
    12·2 answers
  • Convert 2/3 to it's decimal form and round to the nearest thounsandth
    10·2 answers
  • Jenny makes food for her hummingbird feeders
    11·1 answer
  • PLEASE HELP!! THIS IS MY LAST QUESTION FOR THE DAY!!!
    14·1 answer
  • Alicia cashed half of her paycheck and set aside the other half to take her friends out to dinner. She spent 42.15 on dinner and
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!