Ican’t figure it out at all and explain if you can i will give brainliest answer if two people answer i will choose one pl

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

It takes a total of 6 hours to fill up an inground backyard pool using a standard house. a function can represent this situation to represent the amount of water in the pool until it is full a function of time the hose is running. determine the domain for the function

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items