Brainlist answer- which statement explains the property of integer exponents shown in this equation?

On the april 3 billing date, michaelle chappell had a balance due of $ 1495.39 on her credit card. from april 3 through may 2, michaelle charged an additional $ 305.34 and made a payment of $ 800.a) find the finance charge on may 3, using the previous balance method. assume that the interest rate is 1.8 % per month. b) find the new balance on may 3.

How do i do this activity, is appreciated

A10 inch cookie cake is divided into 8 slices. what is the area of 3 slices