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jek_recluse [69]

2 years ago

9

Sarah is a news anchor. She works 55 hours a week, but she is only on-air about 17% of those hours. Approximately how many hours

is Sarah on-air each week?

1 answer:

Paha777 [63]2 years ago

8 0

55hours times .17 will give you the answer.

Sarah spends 9.35hours on air.

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9. Felix has a bucket of golf balls. The table shows the number of golf balls of each color in the bucket. Felix selects a golf

mestny [16]

Answer:

The golf ball is 2 times a likely to be orange as it is to be pink

Step-by-step explanation:

A. green = 18, pink+white+orange = 23

18 not > 23

B. pink $\neq$ white $\neq$ orange $\neq$ green

C. pink x 2 = orange?

4 x 2 = 8

D. white x 7 = green?

white = 11

green = 18

11 x 7 = 77 $\neq$ 18

4 0

2 years ago

Suppose that the distance, in miles, that people are willing to commute to work is an exponential random variable with a decay p

garik1379 [7]

Answer:

<em>m</em> = $\frac{1}{20}$
<em>μ</em> = 20
<em>σ </em>= 20

The probability that a person is willing to commute more than 25 miles is 0.2865.

Step-by-step explanation:

Exponential probability distribution is used to define the probability distribution of the amount of time until some specific event takes place.

A random variable <em>X</em> follows an exponential distribution with parameter <em>m</em>.

The decay parameter is, <em>m</em>.

The probability distribution function of an Exponential distribution is:

$f(x)=me^{-mx}\ ;\ m>0, x>0$

<u>Given</u>: The decay parameter is, $\frac{1}{20}$

<em>X</em> is defined as the distance people are willing to commute in miles.

The decay parameter is <em>m</em> = $\frac{1}{20}$ .
The mean of the distribution is: $\mu=\frac{1}{m}=\frac{1}{\frac{1}{20}}=20$ .
The standard deviation is: $\sigma=\sqrt{variance}= \sqrt{\frac{1}{(m)^{2}} } =\frac{1}{m} =\frac{1}{\frac{1}{20}} =20$

Compute the probability that a person is willing to commute more than 25 miles as follows:

$P(X>25)=\int\limits^{\infty}_{25} {\frac{1}{20} e^{-\frac{1}{20}x}} \, dx \\=\frac{1}{20}|20e^{-\frac{1}{20}x}|^{\infty}_{25}\\=|e^{-\frac{1}{20}x}|^{\infty}_{25}\\=e^{-\frac{1}{20}\times25}\\=0.2865$

Thus, the probability that a person is willing to commute more than 25 miles is 0.2865.

7 0

3 years ago

I am a student in need pls help me

solmaris [256]

Answer:

2*400= 2*400*1

2*400

800

or

2 x 400 = 2 x 100 x 4

100 x 4

= 400

<u>I hope this helps:</u>

Sorry if it didn't :(

7 0

3 years ago

Read 2 more answers

There are 1200 students at Sophie’s school. One student’s name will be drawn at random to win a new bike. What is the probabilit

yawa3891 [41]

Describe the sample space for this problem: 1200 students at a certain school, all with equal probability of being selected on a random draw.

Which outcome (or outcomes) of the sample space compose the event?

Sophie wins the bike. The chances that that will happen are 1/1200, or 0.00083...

8 0

3 years ago

Read 2 more answers

Which measure of variation is found by placing the data in ascending order and subtracting the lowest value from the highest val

igomit [66]

Answer:

Range

Step-by-step explanation:

The range of a given set of data is the difference between the largest value and the smallest value in the data. For convenience and ease in the calculation, it is advisable to place the data in ascending order.

For example, given the following set of data:

4,9,5,6,2

To find the range;

<em>=> First arrange the data in ascending order</em>

2,4,5,6,9

<em>=> Find the smallest and largest numbers and then find their difference.</em>

Since the data has been arranged, it is obvious to see that the smallest number is <em>2</em> and the largest number is <em>9.</em>

Therefore the;

range = 9 -2 = 7

7 0

2 years ago