Use the interest formula A = P( 1+ ") nt An investment offers 4.5% interest compounded weekly if the investor keeps the money untouched for a 4-year period. (This is known as a certificate of deposit.) Round your answers to the nearest cent. Part: 0 / 2 Part 1 of 2 (a) How much would an initial investment of $9000 be worth at the end of the initial 4-year period? At the end of the initial 4-year period, the $9000 would be worth X Undo