Problem:
A cell phone plan costs each month, plus per text message sent, plus for each minute used over hours. In January Juan sent text messages and talked for hours. How much did he have to pay?
Answer Choices:
A.
B.
C.
D.
E.
Solution:
The text messages cost , and the minutes of excess chatting cost . Therefore the total bill came to .
The problems on this page are the property of the MAA's American Mathematics Competitions