Last month Christopher practiced his violin for 16 hours and Patrick practiced his cello for 780 minutes how many more hours did Christopher practice then Patrick?

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)

In the diagram of circle o, what is the measure of zabc?