Question 19 (2 points) How many years will it take $5,000 to amount to $8,000 if it is invested at a rate of 9% interest, compounded continuously? Round your answer to the nearest tenth. A=Pe\" *Numerical answer only. Do not include the word "years" in your answer. [:e/ Question 20 (2 points) A sample originally contains 120 grams of a radioactive isotope. After 220 days, 74.8 grams of the isotope remain in the sample. What is the rate of decay written as a percent? O-0.002% O-0.02% O-0.2% O-0.002Question 21 (2 points) A sample originally contains 120 grams of a radioactive isotope. After 220 days, 74.8 grams of the isotope remain in the sample. What is the half life of the isotope? Round your answer to the nearest day. DO NOT write the word day in your answer. A Question 22 (2 points) A cheesecake is taken out of the oven with an ideal internal temperature of 170 F, and is placed into a 37 F refrigerator. After 10 minutes, the cheesecake has cooled to 150 F. If we must wait until the cheesecake has cooled to 70 F before we eat it, how long will we have to wait? Round your answer to the nearest minute. T(t) = TS + (To TM 0 85 minutes 0 86 minutes 0 87 minutes 0 Cheesecake > Oranges