document.write( "Question 678595: You are trying to dunk a basketball. You need to jump 2.5 ft. in the air to dunk the ball. The height
\n" ); document.write( "that your feet are above the ground is given by the function h(t)= -16t + 12t. What is the maximum
\n" ); document.write( "height your feet will be above the ground? Will you be able to dunk the basketball? \n" ); document.write( "
Algebra.Com's Answer #421560 by nerdybill(7384)\"\" \"About 
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You are trying to dunk a basketball. You need to jump 2.5 ft. in the air to dunk the ball. The height that your feet are above the ground is given by the function h(t)= -16t^2 + 12t.
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\n" ); document.write( "What is the maximum height your feet will be above the ground?
\n" ); document.write( "max height is at the vertex.
\n" ); document.write( "t (at vertex) = -b/(2a)
\n" ); document.write( "t (at vertex) = -12/(2(-16))
\n" ); document.write( "t (at vertex) = -12/(-32)
\n" ); document.write( "t (at vertex) = 0.375 secs
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\n" ); document.write( "height at 0.375 secs:
\n" ); document.write( "h(t)= -16t^2 + 12t
\n" ); document.write( "h(0.375)= -16(0.375)^2 + 12(0.375)
\n" ); document.write( "h(0.375)= 2.25 feet (max height)
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\n" ); document.write( "Will you be able to dunk the basketball?
\n" ); document.write( "NO, because it requires 2.5 feet of height and he only can jump 2.25 \n" ); document.write( "
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