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3 years ago

8

How many

1 answer:

MariettaO [177]3 years ago

6 0

Answer:

5

Step-by-step explanation:

92/17= 5.4

there are 5 total 17s in 92.

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What is the sqaure root of 45n^5? In Radical Form.

laila [671]

<span>45n^(5/2) is the answer

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7 0

3 years ago

Read 2 more answers

A principal believes 50% of her music students reported their practice hours accurately. Based on that assumption, she ran 200 s

Alex17521 [72]

Answer:

C. unlikely

Step-by-step explanation:

Problems of normally distributed samples can be solved using 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.

A probability is said to be extremely likely if it is 95% or higher, and extremely unlikely if it is 5% or lower. A probabilty higher than 50% and lower than 95% is said to be likely, and higher than 5% and lower than 50% is said to be unlikely.

In this problem, we have that:

$\mu = 0.48, \sigma = 0.18$

How likely is it that a single survey would return a mean of 30%?

We have to find the pvalue of Z when X = 0.30.

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

$Z = \frac{0.30 - 0.48}{0.18}$

$Z = -1$

$Z = -1$ has a pvalue of 0.1587.

So the correct answer is:

C. unlikely

4 0

3 years ago

A city has a population of 280,000 people. Suppose that each year the population grows by 8.5% what will the population be in 8

r-ruslan [8.4K]

Answer:

Step-by-step explanation:

Population= 280000 people

Population growth rate= 8.5%

Population growth in a year=

{(100+8.5)÷100} × 280000 =303800 people

Pop growth in 8 years =

303800×8=

2,430,400 people ‍‍‍‍

3 0

3 years ago

a student takes two subjects A and B. Know that the probability of passing subjects A and B is 0.8 and 0.7 respectively. If you

aniked [119]

Answer:

0.64 = 64% probability that the student passes both subjects.

0.86 = 86% probability that the student passes at least one of the two subjects

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

$P(B|A) = \frac{P(A \cap B)}{P(A)}$

In which

P(B|A) is the probability of event B happening, given that A happened.

$P(A \cap B)$ is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: Passing subject A

Event B: Passing subject B

The probability of passing subject A is 0.8.

This means that $P(A) = 0.8$

If you have passed subject A, the probability of passing subject B is 0.8.

This means that $P(B|A) = 0.8$

Find the probability that the student passes both subjects?

This is $P(A \cap B)$ . So

$P(B|A) = \frac{P(A \cap B)}{P(A)}$

$P(A \cap B) = P(B|A)P(A) = 0.8*0.8 = 0.64$

0.64 = 64% probability that the student passes both subjects.

Find the probability that the student passes at least one of the two subjects

This is:

$p = P(A) + P(B) - P(A \cap B)$

Considering $P(B) = 0.7$ , we have that:

$p = P(A) + P(B) - P(A \cap B) = 0.8 + 0.7 - 0.64 = 0.86$

0.86 = 86% probability that the student passes at least one of the two subjects

3 0

3 years ago

The length of a class room is 34 feet. What is this measurement in yards and feet.?

masha68 [24]

34 divided by 3 = 14.6
6 is repetitive so you can round it off to 14.7 meters

5 0

3 years ago