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Tema [17]
3 years ago
12

Hong hikes at least 1 hour but not more than 4 hours. She hikes at an average rate of 2.7 mph. The function f(t)=2.7t represents

the distance she hikes in t hours.
What is the practical range of the function?

a) all real numbers from 1 to 4, inclusive

b) all real numbers

c) all real numbers from 2.7 to 10.8, inclusive

d) all multiples of 2.7 between 2.7 and 10.8, inclusive
Mathematics
1 answer:
Nimfa-mama [501]3 years ago
6 0
C because its the most best answer.
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What is 3 divided by 5 5/8
Sauron [17]
If you would like to know what is 3 divided by 5 5/8, you can calculate this using the following steps:

5 5/8 = 45/8
3 divided by 5 5/8:
3 / 5 5/8 = 3 / 45/8 = 3 * 8/45 = 8/15

The correct result would be 8/15.
5 0
3 years ago
Read 2 more answers
Mark has 5 more pencils than Bill. If Mark has m amount of pencils, which expression gives the number of pencils Bill has?
mars1129 [50]

Answer:

m-5 Tray would be Bill's amount of pencils

5 0
2 years ago
If any two rows of matrix are equal the determinent of the matrix is
dimaraw [331]

Answer:

Then the determinant is 0.

Step-by-step explanation:

Determinant  of ( 1  2 )      =   1*2 - 2*1   = 0

                          ( 1  2 )

4 0
3 years ago
A sample of size 45 will be drawn from a population with mean 53 and standard deviation 11. Use the TI-84 Plus calculator. (a) I
sukhopar [10]

Answer:

a) We have the standard deviation and the mean, so it is appropriate to use the normal distribution to find probabilities for x.

b) There is a 15.97% probability that x will be between 54 and 55.

c) The 47th percentile of x is X = 52.877.

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}

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. Subtracting 1 by the pvalue, we This p-value is the probability that the value of the measure is greater than X.

A sample of size 45 will be drawn from a population with mean 53 and standard deviation 11.

This means that \mu = 53.

We have to find the standard deviation of the sample, that is:

\sigma = \frac{11}{\sqrt{45}} = 1.64

(a) Is it appropriate to use the normal distribution to find probabilities for x?

We have the standard deviation and the mean, so it is appropriate to use the normal distribution to find probabilities for x.

(b) Find the probability that x will be between 54 and 55.

This is the pvalue of the Z score when X = 55 subtracted by the pvalue of the Z score when X = 54.

X = 55

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

Z = \frac{55 - 53}{1.64}

Z = 1.22

Z = 1.22 has a pvalue of 0.88877.

X = 54

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

Z = \frac{54 - 53}{1.64}

Z = 0.61

Z = 0.61 has a pvalue of 0.72907.

So, there is a 0.88877 - 0.72907 = 0.1597 = 15.97% probability that x will be between 54 and 55.

(c) Find the 47th percentile of x. Round the answer to at least two decimal places.

This is the value of X when Z has a pvalue of 0.47;

This is between Z = -0.07 and Z = -0.08. So we use Z = -0.075.

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

-0.075 = \frac{X - 53}{1.64}

X = 52.877

The 47th percentile of x is X = 52.877.

8 0
3 years ago
What is the result of 4÷ 8/12 ? <br>A. 1/6<br>B. 3/8<br>C. 3<br>D. 6<br>help me please ! thank you
IRINA_888 [86]

Answer:

D 6

Step-by-step explanation:

4/1 / 8/12

4/1 * 12/8

48 / 8 = 6


3 0
3 years ago
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