Worksheet11_Sol.pdf - Department of Mathematics University...

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Department of Mathematics, University of Wisconsin-Madison Math 114 Worksheet 11: Sections 5.7, 5.8, 11.6, 6.1, 6.2 1. What rate of interest compounded annually is required to triple an investment in 10 years?
2. The population of a southern city follows the exponential law: N ( t ) = N 0 e kt . If the population doubled in size over an 18-month period and the current population is 10,000, what will the population be 2 years from now?
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3. Solve each system of equations. (a) x 2 - y 2 = 21 x + y = 7

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