(Multiple Choice) - must show work for each question on this part, including the formulas you use to arrive at the answer, if any.

6. The monthly utility bills in a city are normally distributed with a mean of $100 and a

standard deviation of $12. Find the probability that a randomly selected utility bill is less

than $70.

(a) 0.0062

(b) 0.9938

(c) 0.0668

(d) 0.9332

(e) 0.5010