Answer:
The answer is "36.14%"
Step-by-step explanation:
The complete question is given in the attached file please find it.
Using z-table to find the value.

This means that between 42 and 48 months, 36.14 % of scanners could be predicted will break down.
Answer:
9 square root of 7
Step-by-step explanation:
You’re going to break apart radical 28 into square root of 4 and square root of 7.
The square root of 4 is 2 so you add the 2 to the 3 and it equals 5 and since the square root of 7 can’t be simplified and it stays the same. So all you do is add 4 radical 7 and 5 radical 7 which equals 9 radical 7.
Radical- is square root sign
Given:
The last year sales = $288,000,000
Company increased its sales from last year to this year by 34%.
To find:
The this year's sales to the nearest million dollars.
Solution:
We have,
The last year sales = $288 million
The company increased its sales from last year to this year by 34%. So,
This year's sales 



Therefore, this year's sales were 386 million dollars or $386,000,000.