h(t)=-4.9t^2+12.8t

quadratics question tryin to find the zeros the vertex, its a height time question and im having a tough time with it.
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1 Answer

It look like formula for ball yu shoot strate up, but numbers dont match erth g

hite=t*(12.8 -4.9t)

It go up for a short time, then krash tu erth at time=12.8/4.9=2.612244898

me spekt that spozed tu be sekonds
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