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
Talja [164]
3 years ago
14

A trampoline has a jumping surface that is 15.7 ft. long and 12 ft. wide. What is the area of the jumping surface?

Mathematics
2 answers:
Arisa [49]3 years ago
5 0

Answer:

188.4

Step-by-step explanation:

because if you multiply 15.7 and 12 you get 188.4 and that is the area of the jumping space.

allochka39001 [22]2 years ago
4 0

Answer:

area = length×wide=15.7×12=188.4ft²

You might be interested in
Reflect the point (7,0) across the y-axis
stiks02 [169]

A(7,0)\Longrightarrow\boxed{A'(-7,0)}

Hope this helps.

r3t40

3 0
3 years ago
Read 2 more answers
HELPPP
kupik [55]
Your answer is 10 pieces
3 0
3 years ago
A researcher reports survey results by stating that the standard error of the mean is 25 the population standard deviation is 40
bezimeni [28]

Answer:

a) A sample of 256 was used in this survey.

b) 45.14% probability that the point estimate was within ±15 of the population mean

Step-by-step explanation:

This question is solved using the normal probability distribution and the central limit theorem.

Normal probability distribution

When the distribution is normal, we use the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore 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 pvalue, 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.

a. How large was the sample used in this survey?

We have that s = 25, \sigma = 400. We want to find n, so:

s = \frac{\sigma}{\sqrt{n}}

25 = \frac{400}{\sqrt{n}}

25\sqrt{n} = 400

\sqrt{n} = \frac{400}{25}

\sqrt{n} = 16

(\sqrt{n})^2 = 16^2[tex][tex]n = 256

A sample of 256 was used in this survey.

b. What is the probability that the point estimate was within ±15 of the population mean?

15 is the bounds with want, 25 is the standard error. So

Z = 15/25 = 0.6 has a pvalue of 0.7257

Z = -15/25 = -0.6 has a pvalue of 0.2743

0.7257 - 0.2743 = 0.4514

45.14% probability that the point estimate was within ±15 of the population mean

3 0
3 years ago
B. Now, assume that all of these circles have a radius of two. Then, calculate the ratio of a proximate circumference to the dia
Alenkasestr [34]

Answer:

I think b is the answer hopefilly

5 0
2 years ago
Read 2 more answers
Tablespoon(Tbs.)<br> divided by 2 =
OLEGan [10]

Answer:

3 teaspoons

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • The function C(x) = 25.50x + 50 models the total cost for a cleaning company to clean a house, where x is the number of hours it
    7·1 answer
  • Tara made a rectangular fence around here rose so it would not get hurt by her dog she put a fence around the rose that was 4 fe
    6·2 answers
  • Why do plasma particles have charges?​
    15·1 answer
  • 30 ounces is how many pounds
    12·1 answer
  • How are the measures of angles, arcs and segments formed by secant lines that intersect within a circle related?
    8·2 answers
  • Solve for, will give brainliest!
    8·1 answer
  • The student council raised $2,790 during its annual fundraiser. The money was shared equally among the Events Committee, the Spo
    10·1 answer
  • Arc YZ is formed by central Angle YAZ in Circle A below.
    5·1 answer
  • What does 1/5x13/20 equal
    10·2 answers
  • Need help finding the slope of 5/2​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!