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2.yesterday ,a parking lot had 10 cars parked in it.of the cars parked in the parking lot l,40% were silver,3 were red,and the rest were blue.how many of the cars were blue?

A.2 cars

B. 5 cars

C. 3 cars

D. 8 cars

3.everyone in andy's class has to do a science project. Out of the 20 students,80% have completed their project.how many students still need to finish their projects?

A.100 students

B. 36 students

C. 16 students

D. 4 students

4. The circle graph below shows the number of hours per week a college student spends studying each subject of a college core curriculum.

Approximately what percet of these hours is spent on art and math combined?

A. About 60%

B. about 45%

C. About 25%

D. About 20%