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pshichka [43]
3 years ago
12

Please help this is a pre-test of big ideas

Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
4 0
14/56 = p/100 cross multiply then solve so p is 25%
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Which of the following expressions can be used to calculate the area of a square with side lengths 5 inches?
NemiM [27]

Step-by-step explanation:

5x5

because 5^2 equals the area

4 0
2 years ago
The Internal Revenue Service (IRS) provides a toll-free help line for taxpayers to call in and get answers to questions as they
sukhopar [10]

Answer:

From the result of the one-tailed z-test, we can conclude that the mean waiting time is not significantly less than the the 15 minute claim by the taxpayer advocate.

Step-by-step explanation:

Sample size = 50

Mean waiting time = 13 minutes

Standard deviation = 11 minutes

We need to perform one hypothesis test that the actual mean waiting time turned out to be significantly less than the 15-minute claim made by the taxpayer advocate.

The null hypothesis would be that there is no significant difference.

H₀: μ₀ = 15 minutes

The alternative hypothesis would be that the mean waiting time is indeed significantly less than the 15-minute claim by the taxpayer advocate.

Hₐ: μ₀ < 15 minutes.

This is evidently a one tail hypothesis test (we're investigating only in one direction; less than the claim). Hence, we can use the z-test

z = (x - μ)/σₓ

σₓ = (σ/√n) = (11/√50) = 1.556

z = (13 - 15)/1.556 = - 1.29

Using the z-table at significance level of 0.05.

p-value = 1 - 0.9115 (from the z-tables)

p-value = 0.0885

Since the p-value is more than the significance level (0.0885 > 0.05), we do not reject the null hypothesis.

Hence, we accept the null hypothesis and can conclude that the mean waiting time is not significantly less than the the 15 minute claim by the taxpayer advocate.

Hope this Helps!!!

4 0
3 years ago
Last one ok will give you branlist 7 grade math
Naya [18.7K]

Answer:

B

Step-by-step explanation:

hope this helps

6 0
3 years ago
Read 2 more answers
(9x5)x10to the 4th power
WARRIOR [948]
(9\times 5) \times 10^4 = 20 \times 10,000 = 200,000

So 200,000 is your answer :)
7 0
3 years ago
ASAP. Look at the picture. Answer choices are: A) the spring has no stretch when a force of 1 pound is applied. B) the spring st
Katyanochek1 [597]

Answer:

D) the spring has a length of 1 inch when no force is applied

3 0
3 years ago
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