Cindy Regularly Makes Long Distance Phone Calls to Three Foreign

Multiple Choice

Cindy regularly makes long distance phone calls to three foreign cities: London, Tokyo, and Hong Kong. The matrices A and B give the lengths (in minutes) of her calls during peak and nonpeak hours, respectively, to each of these three cities during the month of June. and The costs for the calls (in dollars per minute) for the peak and nonpeak periods in the month in question are given, respectively, by the matrices Compute the matrix AC + BD

A) AC + BD = 287.80
B) AC + BD = 287.30
C) AC + BD = 288.10
D) AC + BD = 287.60