please answer all parts with equations please!

Waiting period. Jamal is waiting to be a millionaire. He wants to know how long he must wait if a. he invests $22.499 82 at 19% today? b. he invests $46,748.78 at 13% today? che invests $157,473,63 at 12% today? d. he invests $328,912,21 at 4% today? a. How long will Jamal have to wait to become a millionaire if he invests $22,499.82 at 19% today? I years (Round to the nearest whole number)