Cindy Regularly Makes Long Distance Phone Calls to Three Foreign

question 9

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

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Definitions:

Price Ceiling

A legal maximum price that can be charged for a product or service, often set by government to control costs for consumers.

Price Floor

A government-imposed limit below which prices cannot fall, often set to protect producers.

Rent

A periodic payment made by a tenant to a landlord for the use of land, a building, or other property.

Demand

The quantity of a good or service that consumers are willing and able to purchase at various prices during a given time period.