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) = − 16t2 + 25t + 3. Show your work.
19. After how many seconds will the balloon hit the ground? (hint: Use the quadratic formula)

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) = − 16t2 + 25t + 3. Show your work.  
  19.  After how many seconds will the balloon hit the ground?  (hint:  Use the quadratic formula)

anonymous · Answer

Do you know how to use the quadratic formula?

anonymous · Answer

no

anonymous · Answer

help please

calculusfunctions · Answer

Quadratic Formula:

If$$a x^{2}+bx +c =0$$then$$x =\frac{ -b \pm \sqrt{b ^{2}-4ac} }{ 2a }$$

calculusfunctions · Answer

When the balloon hits the ground, h(t) = 0.  Thus set the equation to zero and solver for t using the quadratic formula.

anonymous · Answer

− 16t2 + 25t + 3=0

anonymous · Answer

the second part  I don't know how to do it

calculusfunctions · Answer

$$-16t ^{2}+25t +3=0$$where a = -16,  b = 25  and  c = 3

Substitute for a, b, and c in to the formula to calculate the time t.

anonymous · Answer

wat to do next

calculusfunctions · Answer

I just explained.

anonymous · Answer

i'm not sure help me please

calculusfunctions · Answer

You don't know how to plug numbers into a formula or is this a ploy to manipulate someone to just do your work for you? Just wondering!

anonymous · Answer

can u plug in the numbers for me and I will do it