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SVETLANKA909090 [29]
3 years ago
11

Travel time: 3.5 hours

Mathematics
1 answer:
kifflom [539]3 years ago
8 0
60 mi/h * 3.5 h = 210 mi
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n HP laser printer is advertised to print text documents at a speed of 18 ppm (pages per minute). The manufacturer tells you tha
Dominik [7]

Answer:

0.321 is the probability that their mean printing speed of the sample is greater than 17.99 ppm.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 17.39 ppm

Standard Deviation, σ = 4.25 ppm

Sample size = 11

We are given that the distribution of printing speed is a bell shaped distribution that is a normal distribution.

Formula:  

z_{score} = \displaystyle\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}  

P(printing speed of the sample is greater than 17.99 ppm.)  

P(x > 17.99)  

P( x > 17.99) = P( z > \displaystyle\frac{17.99-17.39}{\frac{4.25}{\sqrt{11}}}) = P(z > 0.468229)\\\\P( z > 0.468229) = 1 - P(z < 0.468229)

Calculating the value from the standard normal table we have,

1 - 0.679 = 0321= 32.1\%\\P( x > 17.99) = 32.1\%

Thus, 0.321 is the probability that their mean printing speed of the sample is greater than 17.99 ppm.

8 0
3 years ago
Which of the following expressions is the inverse of the function y equals quantity x minus 2 divided by 3?
Natalija [7]
Y = (x - 2)/3
3y = x - 2
x = 3y + 2

Therefore, the inverse of y = (x - 2)/3 is y = 3x + 2
6 0
3 years ago
The scores awarded to 25 students for an assignment were as follows
Kisachek [45]

Answer:

<h2>Here</h2>

The numbers less than 50 (A) = 4

Total numbers (S) = 14

Probability students below 50 = 4÷14

Step-by-step explanation:

That is the correct answer of it.

3 0
2 years ago
Find the sum of 3x + 2,5x- 7 and - 3 + 2x ​
lions [1.4K]

Step-by-step explanation:

the answer is 10x - 8.

3x+2

5x-7

2x-3

--------

10x-8

----------

-------- hope this helps you and please try to mark me as BRAINLIST.

6 0
2 years ago
A salesperson receives a 3% commission on sales. The salesperson receives $180 in commission. What is the amount of sales?
timurjin [86]
Fraction: 180/x = 3/100
cross multiply: 18000 = 3x
divide ea. side by 3: x = $6,000
Amt. of sales = $6,000
4 0
2 years ago
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