9.5) In. Asmi 97 (Section 5 (x + 2)2 1/3 -x - 20 In ( x + 2)2 (Simplify your answer. Type an exact answer. Use integers or fractions for any numbers in the expression.)Lisa Alonzo 05/01/22 9:13 PM Homework: Asmt 59 (Section Question 4, 9.7.15 HW Score: 17.22%, 1.55 of 9 9.7) Part 1 of 5 points O Points: 0 of 1 Save A painting sold for $247 in 1977 and was sold again in 1990 for $404. Assume that the growth in the value V of the collector's item was exponential. a) Find the value k of the exponential growth rate. Assume V. =247. K =] (Round to the nearest thousandth.) Skill builder Check answer Clear all Get more help - View an example Help me solve this at tvLisa Alo Homework: Asmt 59 (Section HW Score: 17. 9.7) Question 6, *4.8.9 points O Points: 0 of The half-life of radium is 1690 years. If 50 grams are present now, how much will be present in 90 years? grams Do not round until the final answer. Then round to the nearest thousandth as needed.)Lisa Alonzo 05/01/22 9:17 PM (?) Homework: Asmt 59 (Section HW Score: 17.22%, 1.55 of 9 9.7) Question 7, 9.7.9 points O Points: 0 of 1 Save The radioactive element carbon-14 has a half-life of 5750 years. A scientist determined that the bones from a mastodon had lost 62.4% of their carbon-14. How old were the bones at the time they were discovered? The bones were about years old. (Round to the nearest integer as needed. Help me solve this View an example Get more help - Clear all Skill builder Check answer ALisa Alonzo 05/01/22 9:18 PM OK: Asmt 59 (Section 9.7) Question 2, *4.8.3 HW Score: 17.22%, 1.55 of 9 Part 1 of 4 points ( Points: 0 of 1 Save Strontium-90 is a radioactive material that decays according to the function A(t) = A e -0:0244, where An is the initial amount present and A is the amount present at time t (in years). Assume that a scientist has a sample of 800 grams of strontium-90. (a) What is the decay rate of strontium-90? (b) How much strontium-90 is left after 20 years? (c) When will only 200 grams of strontium-90 be left? (d) What is the half-life of strontium-90? (a) The decay rate of strontium-90 is%. (Type an integer or a decimal. Include the negative sign for the decay rate.) Clear all Check answer View an example Ask my instructor Help me solve this tv A