The height of a flare fired from the deck of a ship in distress can be modeled by #h= - 16t^2+ 104t+ 56#, where #h# is the height in feet of the flare above water and #t# is the time in seconds. What is the time it takes the flare to hit the water?
t = 7 seconds
The flare hit the water when
divide the equation by 8,
since unit of time cannot be a -ve value, therefore t, time the flare hit the water is at 7s