A ball falls from the top of a roof 320 feet above the ground. The formula h = -16t2 + 16t + 320 described the height of the ball above the ground, h, in feet, t seconds after the fall begins. How long will it take the ball to strike the ground?

### Recently Asked Questions

- Refer to Figure 2 . If the price decreased from $ 18 to $ 6 , total revenue would

- Refer to the graph above to answer this question . What does the distance Q1 - Q2 represent ?

- Refer to the above figure . Suppose this economy is producing at point W . Which of the following statements would best explain this situation ?