Titan technology is a tech company that is a new cell phone service provider. Their rate for any phone call is determined as follows: the first minute costs $.15 and every minute thereafter costs $.01. Statisticians who work for Titan Technology collected information for a month regarding the costs of phone calls. The costs were normally distributed with a mean of $.25 and a standard deviation of $.03.

A. How much would a 20 minute phone call cost?

I got 34 cents but am not sure

B. Write a formula to represent the cost of a phone call. Use "c" to represent cost and "m" to represent the number of minutes.

C. A rival tech company, Idealistic Innovations, charges a flat rate of $.29 per call. Determine when a phone call would cost the same using Idealistic and using Titan.

D. Using what you learned in part C determine the percent of calls made my Titan Technology customers that would be cheaper if they had used Idealistic Innovations instead.