In a city, the Internet fee is charged according to the table below.

For the first 20 hours |
$5 total |

For every additional hour |
$0.20 per hour |

If Jane paid $7.20 for her Internet fee last month, how many hours did she spend on the Internet?

hours

Jane paid $5 for her first 20 hours. She then paid $7.20 – 5.00 = $2.20 for her additional hours.

Since she paid $0.20 for each additional hour, she spent $2.20 ÷ $.20 = 11 additional hours on the internet.

Add the 20 initial hours she spent on the internet to this to get the total: 20 + 11 = 31 hours