What’s the ansawer please

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

Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?

Ten times the square of a non-zero number is eqaul to ninety times the number