Shapur has 1 1/5m of string

I'm being volume of cylinder with 13 in. radius and 30 in height answer choices in pic

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

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)