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
Answer:The answer is 25 blocks
Step-by-step explanation: This is because if 17 and -8 are subtracted, you get 25.
Answer:
18,000 is the maximum and indicates highest profit
Step-by-step explanation:
sorry for leaving that second part out
Answer: n3 when
Step-by-step explanation: just say he fell in the water