## Intermediate Algebra for College Students (7th Edition)

$\approx 5.2340$
RECALL: The change-of-base formula for logarithms: $\log_a{b} = \dfrac{\log{b}}{\log{a}}$ Use the formula above to obtain: $=\dfrac{\log{400}}{\log{\pi}}$ Use a calculator to evaluate to four decimal places: $\approx 5.2340$