If Kendall walks at a steady pace of 3 mph, how long will it take her to walk 9 mi.? A. 1 hr.
B. 2 hr.
C. 3 hr.
D. 4 hr.

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500