To solve this problem, we need to have an understanding of both word problems, and logarithms.

First, we need to recognize that we are isolating a ratio of variables: (P/P0). Then, substitute in the 60 for the dB value, and solve.

Divide by 10 to get the logarithm all alone:

Using properties of logarithms, rewrite as an exponential:

Thus, the answer is D.