Answer:
Answer:
Step-by-step explanation:
Step-by-step explanation:
Answer:
-7/10
Explanation:
Given the expression

We can rewrite the expression as:

The number line showing the location of the two numbers is attached below. Therefore:
To answer (a), we will need to find the Z value for 710 hours and 990 hours.


B) 68% of data lies between one standard deviation of the mean.
850 +70 = 920
850 - 70 = 780
the product of five times a number and nine the difference of nine times a number and five the sum of five times a number and five the difference of five times a number and nine