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chapter11practiceworksheet - Chapter 11 Practice Worksheet...

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Chapter 11 Practice Worksheet Directions : Solve the following problems on a separate sheet of paper. Show all your work. Circle your answer. 1. The population of Orangedale is increasing at the rate of 4% per year. The population in 1990 was 50,000 people. Find the population in 1991, 1992, and 1995, respectively. 2. If $8000 are invested in an account that pays 5.25% interest compounded annually. (a) How much will be in the account after 4 years? (b) How long will it take until the account has $25000? 3. An investment of $500 increased to $1000 after 12 years. At what rate was the money invested if the interest was compounded monthly? 4. A research biologist began to grow a culture in which the number of bacteria doubled every day. Three days later, she began a second culture in a richer medium so that the number of bacteria increased fourfold everyday. If each culture was begun with the same number of bacteria present, how many days after starting the second culture will the number of bacteria in the two cultures be equal?
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