If the average American sleeps 8 hours a night, with a standard deviation of 1 hour, and I plan on gathering a sample of 12 college students to compare to this population, find the following: mu =
sigma =
mu_x bar =
sigma_x bar =

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?

Determine domain and range, largest open interval, and intervals which function is continuous.

The answer is 7.2 how would you put this as money