Find the perimeter of the polygon

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?

3x = 729 solve for x plz . it's urgent. will mark

If wxyz is a square, which statements must be true?