Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 7 - Exponents and Exponential Functions - 7-7 Exponential Growth and Decay - Practice and Problem-Solving Exercises - Page 465: 34


9 years

Work Step by Step

The equation is A=100(1.08$)^{N}$. You have to find out how many years it takes to have 200 dollars so you plug in a=200: 200=100(1.08$)^{N}$ -divide both sides by 100- 2=(1.08$)^{N}$ -solve- n $\approx$9 You can use a table, by plugging in the value of n=1,n=2 n=3 and so on until you find the value of A is 200.You can draw a graph and find the n value at A=200
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