1. Comparing Financial Models. I am considering the following four investment options: A mutual fund that triples in value every 15 years. A fixed-rate certificate of deposit that pays 7.4% interest, compounded continuously. A savings account that pays 7 % compounded monthly. A bond that costs $5200 and in nine years is redeemable for $10000. Compare these opportunities. Which is the best? Justify your answer.

2.. Newton's Law of Cooling. Mr. Smith was murdered; he was found in his kitchen at 9:00 AM at which time his body temperature was 77.3 and the room temperature was 70. When the coroner arrived one hour later, she measured his body temperature and found that it had cooled to 76.0. Assuming that his body temperature was 98.6 when he died, find the time that Mr. Smith was murdered.