Recall the compound interest formula A = a(1 + r/k)^(kt). Use the definition of a logarithm along with properties of logarithms to solve the formula for time t.

Can someone please help me solve this? I've been trying for a couple of hours and I just don't get it. I want to understand it.
I know what the answer should be but I just don't know how to get there.

Never mind I finally got it.