Use the Change-of-Base Formula and a calculator to evaluate the logarithm. Round your answer to two decimal places.
-$\log _ { \sqrt { 5 } } 215.3$
A) 6.68
B) 3.34
C) 0.15
D) 0.35

Question

Quizplus · Accepted Answer

The Change-of-Base Formula allows us to rewrite the logarithm in a form that can be calculated using a standard calculator: $\log _ { \sqrt { 5 } } 215.3 = \frac{\log _ { 10 } 215.3}{\log _ { 10 } \sqrt { 5 }}$. Using a calculator to evaluate this expression gives approximately 6.68.

Use the Change-Of-Base Formula and a Calculator to Evaluate the Logarithm