aeldridge0177ot34em aeldridge0177ot34em
  • 14-07-2017
  • Mathematics
contestada

how long would it take for an egg dropped from a helicopter to fall 256 feet to the ground? d=16t^2

Respuesta :

irspow
irspow irspow
  • 14-07-2017
Well the position function is:

h(t)=-16t^2+256

It will hit the ground when h(t)=0

-16t^2+256=0  factor out -16

-16(t^2-16)=0  factor difference of squares...

-16(t+4)(t-4)=0, since t>0

t=4 seconds


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