A ball is thrown off a cliff. The height of the ball off the ground after time t is given by the equation h(t)= -5^2 - 5t + 180. How high is the cliff? How long does it take the ball to reach a ledge 80m high?

15

Step-by-step explanation:

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

c

step-by-step explanation: easy math