The lengths of phone calls to the receptionist of a small company are i. i.d. with a mean of 4 minutes and an SD of 10 minutes. a) Find or approximate the chance that the total length of the next 250 calls is less than 20 hours. b) Did you use the normal curve in your calculation in a

60.9774

step-by-step explanation:

because when you add 47.6 plus 7.32 equals 54.92

and when you add .0574 + 6= 6.0574

and when you add 54.92 and 6.0574 you get the answer of 60.9774.

plzz mark brainlest last one got deleted. cause i didn't explain it but i did but i understand what the mod meant

mathpapa

step-by-step explanation:

there still no table