A ball is thrown into the air with an initial upward velocity of 60 ft/s. Its height h in feet after t seconds is given by the function h = –16t² + 60t + 6. After about how many seconds will the ball hit the ground?

3

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6

Question

A ball is thrown into the air with an initial upward velocity of 60 ft/s. Its height h in feet after t seconds is given by the function h = –16t² + 60t + 6. After about how many seconds will the ball hit the ground?  

3

4

5

6

amistre64 · Answer

what are the zeros of the equation?

amistre64 · Answer

with 4 options we can simply test them out to see what gets closest

amistre64 · Answer

-16  60   6
      0  -48  36
  -----------
3) -16  12   42 not a zero

amistre64 · Answer

-16  60   6
      0  -80  -100
  -----------
5)-16  -20  not a zero

    -16  60   6
      0  -64 -16
  -----------
4)-16   -4


hmm

amistre64 · Answer

http://www.wolframalpha.com/input/?i=%E2%80%9316t%5E2+%2B+60t+%2B+6 i spose its closer to 4 than 3