Pls help thank you so much

The circumference of a circle is 5 pi cm. what is the area of the circle?

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number tt of tokens james has is a function of gg, the number of games he plays

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list