Answer
The initial amount is 15
Work Step by Step
The exponential formula is y=a(b$)^{x}$.A is the initial amount and B is the growth/decay factor. Therefore, the initial amount of y=15 $\times$ $3^{x}$ is 15 because it is the value of A.
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
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 - Lesson Check - Page 463: 2
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