Answer
$-2.09$
Work Step by Step
$0.5^x-0.25=4$
(Add both sides with $0.25$)
$0.5^x=4.25$
(Use the property $a^x=y\Leftrightarrow x=\log_a y$)
$x=\log_{0.5}4.25$
(Compute the value of $x$)
$x=-2.087462....$
$x\approx -2.09$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 7 Exponential and Logarithmic Functions - 7.6 Solve Exponential and Logarithmic Equations - 7.6 Exercises - Skill Practice - Page 520: 20
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