HELP PLEASE!!!! SOMEBODY PLEASE LOOK AT THE QUESTION IF YOU ARE WILLING TOO HELP!!!!! PLEASE!!!Derek kicks a soccer ball off the ground and in the air with an initial velocity of 31 feet per second. Using the formula H(t) = -16t2 + vt + s, what is the maximum height the soccer ball reaches?

14.2 feet

14.6 feet

15.0 feet

15.3 feet

Question

HELP PLEASE!!!! SOMEBODY PLEASE LOOK AT THE QUESTION IF YOU ARE WILLING TOO HELP!!!!! PLEASE!!!Derek kicks a soccer ball off the ground and in the air with an initial velocity of 31 feet per second. Using the formula H(t) = -16t2 + vt + s, what is the maximum height the soccer ball reaches?

 14.2 feet

 14.6 feet

 15.0 feet

 15.3 feet

amistre64 · Answer

what is the vertex of the quadratic?

amistre64 · Answer

H(t) = -16t2 + vt + s

v = initial velocity, and s is the initial height .... assume ground level = 0 height

H(t) = -16t2 + 31t, find the vertex

anonymous · Answer

@amistre64 my answer was 15

imstuck · Answer

You could also complete the square and find the highest or max height.  I did it and got the height of 15.0 as well.

anonymous · Answer

@IMStuck that's the answer you got?? Can you help me with some more??