(Compound interest) To what amount will the following investments accumulate? a. $4,900 invested for 9 years at 11 percent compounded annually b. $8,000 invested for 7 years at 9 percent compounded annually c. $755 invested for 11 years at 13 percent compounded annually d. $20,000 invested for 6 years at 4 percent compounded annually a. To what amount will $4,900 invested for 9 years at 11 percent compounded annually accumulate? $ (Round to the nearest cent.) b. To what amount will $8,000 invested for 7 years at 9 percent compounded annually accumulate? $ (Round to the nearest cent.) c. To what amount will $755 invested for 11 years at 13 percent compounded annually accumulate? $ (Round to the nearest cent.) d. To what amount will $20,000 invested for 6 years at 4 percent compounded annually accumulate? $ (Round to the nearest cent.)