I know this seems so easy, but I can't figure this out.

The problem:

What is the velocity of an object dropped from a height of 130 m when it hits the ground?

I know that the formula for velocity is v(t)=v0-gt, but I can't figure out how to determine what some of those variables are. And I can't figure out how to incorporate the height, which I assume should be some form of s(t). Any help would be greatly appreciated!