A rock is thrown from one side of a river to another. The function h(t) = −16t2 + 12t + 3 gives the height in inches of the rock t seconds after it has been thrown. What does 0 =−16t2 + 12t + 3 represent in the context of the problem?

The equation 0 = −16t^2 + 12t + 3 represents the time it takes for the rock to hit the water on the other side of the river. This is when the height of the rock is equal to 0 inches, meaning it has reached the water at the other side of the river.