Question

If a baseball player hits a baseball from 4 feet off the ground with an initial velocity of 64 feet per second, how long will it take the baseball to hit the ground? Use the equation h = -16t2 + 64t + 4.

Answer 1

using the quadratic formula

Answer 2

Well there is no acceleration in the x direction.

So factor the expression.

\t1,t2 = [\frac{ - 64 \pm \sqrt{64^{2}-(4)(-16)(4)}}{ 2(-16) }\]

Answer 3

1.-2+or-sqrt17over2
2.2+or-2sqrt17allover2
3.2+or-4sqrt17
4.16+or-sqrt17allover2

Answer 4

those are the answers which one do u think is right