11. [1!2 PoinB] PREVIOUS ANSWERS SPRECALC7 4.5.089. A man invests $3000 in an account that pays 8.5% interest per year, compounded quarterly. (a) Find the amount after 2 years? (Round your answer to the nearest cent.) $- at 3549.59 (b) How long will it take for the investment to triple? (Round your answer to two decimal places.) 13.06 .I yr Need Help? Submit Answer 7. [-11 Points] DETAILS OSPRECALC14.7.403. A tumor is injected with 0.1 grams of Iodine125, which has a decay rate of 1.15% per day. To the nearest day, how long will it take for half of the Iodine125 to decay? days Addional Materials [3] eBook [3] Learn by Example 8. [-/5 Points] DETAILS OSPRECALC1 4.7.389-394.WA. TUT. The temperature 7 (in F) of a roast beast t minutes after it is removed from the oven is given by T(t) = 72 + 100e-0.02t, t 2 0. (a) Find T(0). T(0) = OF Interpret T(0). When it is removed from the oven, the roast beast is T(0) OF. o When the roast beast is first put into the oven, it is T(0) F. After it has completely cooled, the roast beast is T(0) F. o T(0) has no significance. (b) When is the temperature of the roast beast cooler than 85OF? o (0, 50) . [100 In(13), co) o (In(85), 100] (-50 In 13 100 1,00 ) O ( -00, 00 ) (c) Sketch the graph of y = T(t). 1000 150 800 100 600 400 50 200 O 50 100 150 200 250 300 20 40 60 80 100 y 2001 150- 150 100 100 50 50 50 100 150 200 250 300 20 40 60 80 100