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October 23, 2014

Homework Help: Math

Posted by Anonymous on Sunday, November 25, 2012 at 1:05pm.

A manufacturer decides to build a half-pipe with a parabolic cross section modelled by the relation y=0.2x^2-1.6x+4.2, where x is the horizontal distance, in metres, from the platform, and y is the height, in metres, above the ground. Complete the square to find the depth of the half-pipe.

I completed the square to get
y=(x-4)^2 +1 but am not quite sure where they got an answer of 3.2 metres from. Any help appreciated!

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