please show workings for 9 and 10

9. [0/2 Points] DETAILS PREVIOUS ANSWERS SPRECALC7 4.5.090.MI. 3/6 Submissions Used A woman invests $6300 in an account that pays 6% interest per year, compounded continuously. (a) What is the amount after 3 years? (Round your answer to the nearest cent.) (b) How long will it take for the amount to be $8000? (Round your answer to two decimal places.) yr Need Help? Read It Master It 10. [0/1.12 Points] DETAILS PREVIOUS ANSWERS SPRECALC7 4.5.096.MI. *1/6 Submissions Used The velocity of a sky diver t seconds after jumping is given by v(t) = 80(1 - e-0.20). After how many seconds is the velocity 60 ft/s? (Round your answer to the nearest whole number.) 4.1334 x sec Need Help? Read it Master It