Quadratic Equation Word Problem Please Help

Quadratic equations and inequalities, variation equations, function notation, systems of equations, etc.
ilovemath92
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Quadratic Equation Word Problem Please Help

Postby ilovemath92 » Thu Mar 24, 2011 11:07 pm

In order to dunk a basketball, you need to jump 2.5ft in the air to dunk the ball. The height that your feet are above the ground is given by the function (h)=-4T(4T+3). What is the maximum height your feet will be above the ground? Will you be able to dunk the basketball.

This problem was on a review for a test and stumped the tutor. We are wondering if the problem is written incorrectly or there is info missing.

Thanks all!

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little_dragon
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Re: Quadratic Equation Word Problem Please Help

Postby little_dragon » Fri Mar 25, 2011 11:19 am

i did this in school last semester. they want u to find the vertex b/c max is at vertex. u can use formula here:

http://www.purplemath.com/modules/grphquad2.htm

go down page about 1/2 to get the formula


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