algebra1 HELP PLEASE Thanks you!!

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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

  • algebra1 HELP PLEASE Thanks you!! -

    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

  • Steve and Ms Sue -

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

  • Reiny -

    Oh well.

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

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