Asked by lisa

wo identical rubber balls are dropped from different heights. Ball 1 is dropped from a height of 100 feet, and ball 2 is dropped from a height of 210 feet. Write a function for the height of each ball.

h1(t) =
h2(t) =

When does ball 1 reach the ground? Round to the nearest hundredth. _____seconds
When does ball 2 reach the ground? Round to the nearest hundredth. _____seconds
Answered by Reiny
h1(t) = -16t^2 + 100
h2(t) = -16t^2 + 210

when ball 1 reaches ground, h1(t) = 0

16t^2 = 100
t^2 = 100/16
t = √(100/16) = 10/4 = 5/2 seconds

do the 2nd the same way
Answered by Reiny
Had no idea that Lisa had asked this question several times before and had shown no sign of effort.
(I started answering top down)
Answered by Steve
Oh well.

If her guile and persistence have helped her learn the material, it has worked out ok.
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