A water balloon is tossed into the air with an upward velocity of 25 ft/s. Its height h(t) in ft after t
seconds is given by the function h(t) = − 16t
2 + 25t + 3. Show your work.
19. After how many seconds will the balloon hit the ground? (hint: Use the quadratic formula)
20. What will the height be at t = 1 second
Please help.

Question

A water balloon is tossed into the air with an upward velocity of 25 ft/s. Its height h(t) in ft after t
seconds is given by the function h(t) = − 16t
2 + 25t + 3. Show your work.
 19. After how many seconds will the balloon hit the ground? (hint: Use the quadratic formula)
20. What will the height be at t = 1 second
 Please help.

kimjafo · Answer

@Nnesha  May you please help me work this out, if you can?

jpes2193 · Answer

yep just gotta find the notes on this.. i just learned this.. lol

kimjafo · Answer

Thanks lol I always have trouble with these

alekos · Answer

for the 2nd one just plug in the value t = 1

kimjafo · Answer

Oh alright, seems extremly obvious now that i look at it mor >.< thanks

alekos · Answer

for the 1st one you need the height h(t) = 0,   so we have

-16t^2 + 25t +3  = 0   and then use the quadratic formula

jpes2193 · Answer

I think with the first one you can set the equation to zero and then substitute the function in for t and solve for t?

kimjafo · Answer

Yea, i think im figuring it out now. I just got confused lol

jpes2193 · Answer

yea do what @alekos said... haha sorry i found it in my book and was trying to simplify it

kimjafo · Answer

Thank you both

alekos · Answer

yeah no problem