Answer
See explanations.
Work Step by Step
If $f(t)$ is the amount an investment will grow to t years after 2004, then $f^{-1}(50,000)$ will represents the time $t$ (in years after 2004) it takes for the investment to reach 50,000 dollars.
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 4 - Inverse, Exponential, and Logarithmic Functions - Chapter 4 Test Prep - Review Exercises - Page 491: 9
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