If an object is dropped from a height of 200 feet, the function h(t)=-16t^2+200 gives the height of the object after t seconds. Approximately, when will the object hit the ground?

a. 200.00 seconds
b. 184.00 seconds
c. 3.54 seconds
d. 0.78 seconds

Question

If an object is dropped from a height of 200 feet, the function h(t)=-16t^2+200 gives the height of the object after t seconds. Approximately, when will the object hit the ground?

a. 200.00 seconds
b. 184.00 seconds 
c. 3.54 seconds
d. 0.78 seconds

mathmale · Answer

Here you have an equation for the height of an object off the ground.  When the object touches the ground, that height is zero.  Thus, set your equation to zero and solve it for t.  Please show your work.

yumyum247 · Answer

|dw:1461018446978:dw| slap me if am wrong..loll