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In equation y equals -0.02x2 plus 2.4x for what value of x be a maximum?
Miniminime
y=-0.02x2+2.4x
This is a downward facing parabola.. It will have a maximum when dy/dx = 0
dy/dx = -0.04x+2.4
-0.04x+2.4=0
-0.04x=-2.4
x=60
y has a maximum of 72 when x=60
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