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Use this position polynomial to calculate the following:

1.The height of the object after 2 seconds
2.The height of the object after 4 seconds
3.How long the object will take to reach the ground?
4.Write the position function for an object that is thrown upward from a 180 ft. building with an initial velocity of 20 ft/sec.

1. 192
2. 150

I am not sure how to do numbers 3 and 4 and I am not sure If I did 1 and 2 right?

Thanks in advance!

  • -MATH- -

    #1. ok
    #2. I get 160 -- better check again
    #3. solve for t when h=0
    #4. 180 + 20t - 16t^2

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