## Precalculus: Mathematics for Calculus, 7th Edition

$\log_2 60$ - $\log_2 15$ Apply the Second Law of Logarithms $\log_2 (\frac{60}{15})$ $\log_2 4$ Rewrite 4 $\log_2 2^2$ Since the base and the number are the same, we remove everything except the exponent = 2