What is the standard equation for a circle centered at the origin with radius r

For what value of (y) is 3^3/3^y =1/9

Kristen is wrapping presents for the holidays. she has a box that measures 4 ft. x 2 ft. x 2 ft. how many square feet of wrapping paper does she need to cover the box without overlapping?

Given abc find the values of x and y. in your final answer, include all of your calculations.