A rock falls from a bridge into the water below. The equation H=−16t^2+225 gives the height (measured in feet) of the rock above the water after t seconds. Use this information to complete the table below, and then use the table to answer the questions that follow.

Elapsed Time (seconds) 0 1.5 2.5 2.75 3.5 3.75
Height (feet)

1. How high was the bridge?
feet

2. How long does it take for the rock to hit the water?
seconds