How to find area and circumference of a circle

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

16 more than the product of 5 and p

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days