Question

A​ long-distance telephone company charges a rate of 6 cents per minute or a 40​-cent minimum charge per completed​ call, whichever is greater. Find the​ cost, in cents per​ minute, for a 3​-minute call.

Answer 1

Given

charges per call are the maximum of $0.40 or $0.06 per minute

Find

the charge for a 3-minute call

Solution

maximum( $0.40, $0.06 × 3 ) = maximum( $0.40, $0.18 ) = $0.40

The charge for a 3-minute call is $0.40.