Answer
$log_{2}$ (60/15) = 2
Work Step by Step
1. The law needed for this problem is $log_{a}$($\frac{A}{B}$) = $log_{a}$(A) - $log_{a}$(B).
2. Convert the equation to $log_{2}$ (60/15).
3. Solve the Function $log_{2}$ (4) , which gives you 2.
4. Or you can convert to exponents, if that is better.
5.$ 2^{x}$ = $\frac{60}{15}$ or $ 2^{x}$ = 4
6. Solving for X gives you 2.