Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 7 - Exponents and Exponential Functions - 7-7 Exponential Growth and Decay - Practice and Problem-Solving Exercises - Page 459: 26


Initial Amount: 0.1 Decay Factor: 0.9

Work Step by Step

To find the initial amount, plug 0 in for x: y = 0.1 (0.9)$^{x}$ y = 0.1 (0.9)$^{0}$ y = 0.1 (1) y = 0.1 0.9 is the decay factor because this is the value that is attached to the "x" exponent. In other words, this is the value that will determine by how much x decays.
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