### Home > CCA2 > Chapter 10 > Lesson 10.2.2 > Problem 10-130

10-130.

For an object shot into the air, its height . Use this equation to answer the following questions.

At what times is the object on the ground?

This is when the height is zero, or

.For what domain is this function reasonable?

This is an object shot into the air, hence its height is always positive or

. For what times is ?How long did it take the object to hit the ground?

Use your answers to part (a).

For what times is the height greater than

feet? Solve

.