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lina2011 [118]
3 years ago
14

Please help with this question!!!!

Mathematics
1 answer:
dybincka [34]3 years ago
5 0

The m,maximum height is the vertex.  The (x, y)

x is the time

y is the height

h= -5t2 + 21t

find the vertex

-b/2a  is the x

-21/2(-5)  = -2.1 (-10) =  -2.1  is that man seconds its at its highest

now plug into

h= -5(2.1)^2 + 21(2.1) the answer is the max height

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