Here's the question you clicked on:
kymber
An object is launched at 19.6 m/s from a height of 58.8 m. The equation for the height (h) in terms of time (t) is given by h(t) = -4.9t² +19.6t + 58.8. What is the object's maximum height?
Convert it to the vertex form (have you learned that yet?).
Try to find the roots using the quadratic formula, then take the value of t half-way in between the roots and plug in. I think that should work
Basically, the parabola opens downwards. So see here:\[-4.9t^2 + 19.6t +58.8 = -4.9t(t - 4) + 58.8\]
Hmm actually\[-4.9t^2 + 19.6t + 58.8 = -4.9(t^2 - 4t) + 58.8\]\[= -4.9(t^2 - 4t + 4 - 4) + 58.8 = -4.9(t - 2)^2 + 54.8\]
@ParthKohli, I don't understand this at all! :( What does that mean? How did you get it? Am I supposed to solve for t?