Waiting period. Jamal is waiting to be a millionaire. He wants to know how long he must wait if a. he invests $27,128.18 at 21% today? b. he invests $45,224.22 at 17% today? c. he invests $146,638.27 at 12% today? d. he invests $310,472.65 at 6% today? a. How long will Jamal have to wait to become a millionaire if he invests $27,128.18 at 21% today? years (Round to the nearest whole number.)