Ann wants to choose from two telephone plans. Plan A involves a fixed charge of $10 per month and call charges at $0.10 per minute. Plan B involves a fixed charge of $15 per month and call charges at $0.08 per minute. Which statement correctly compares the two plans?

Ann wants to choose from two telephone plans. Plan A involves a fixed charge of $10 per month and call charges at $0.10 per minute. Plan B involves a fixed charge of $15 per month and call charges at $0.08 per minute.

Plan A $10 +.10/minute

Plan B $15 +.08/minute

If 250 minutes are used:

Plan A: $10+$25=$35

Plan B: $15+$20=$35

If 400 minutes are used:

Plan A: $10+$40=$50

Plan B: $15+$32=$47

B is the correct answer. How to test it:

Plan A: $10 + (.10*249 minutes)

$10+$24.9=$34.9

Plan B: $15 + (.08*249 minutes)

$15+$19.92=$34.92

Plan A < Plan B if less than 250 minutes are used.