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.

Question

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

Answer 1

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

Answer 2

Had no idea that Lisa had asked this question several times before and had shown no sign of effort.
(I started answering top down)

Answer 3

Oh well.

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