Solve the following: 1. How long does it take for an investment to double at an annual interest rate of 8.5% compounded continuously? 1. In 2009 the population of a small town was 42,386 and was increasing at a rate of 0.9% per year. In what year will the town's population reach 50,000 at the same rate of growth? 1. An endangered species has a population of 8000. Scientists estimate that the stock is decreasing at 5% per year. At this rate, approximately how many years will it be before 40% of the species remains?

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