The circle graph shows how Tremaine divided his time on the computer last week.
Tremaine used the computer a total of 30 hours last week. How many more hours did Tremaine use the computer to play games than to do research?
A. 1.5 hours
B. 20 hours
C. 6 hours
D. 7.5 hours
![The circle graph shows how Tremaine divided his time on the computer last week Tremaine used the computer a total of 30 hours last week How many more hours did class=](https://us-static.z-dn.net/files/d3b/4213d48b494d5baf1cc1ef8c710ce7c0.png)