Question

Please help me! I don't understand this! DUE TODAY


As a part of an engineering contest, a student who has designed a protective crate for an egg drops a crate from a window 18 ft above the ground. the height (in feet) of the crate as it falls is given by h(t)=-16t^2+18, where t is the time (in seconds) since the crate was dropped.

write and solve an equation to find the amount of time before the crate passes a window of 10 ft directly below the window from which the crate was dropped.

write and solve an equation to find the amount of time before the crate hits the ground.

is the rate at which the crate falls constant? Explain.

Answer 1

Answer: See the answers below.

The first equation that needs to be solve is: 10 = -16t^2 + 18
If you use the quadratic equation, you will get 0.707 seconds.

For the second equation, you need to solve 0 = -16t^2 + 18.
If you use the quadratic equation, you will get 1.061 seconds.

No, the rate of change is not constant because this is a quadratic equation.