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October 25, 2014

October 25, 2014

Posted by **sarah** on Thursday, February 13, 2014 at 4:38pm.

- math -
**Damon**, Thursday, February 13, 2014 at 4:49pmV = pi r^2 h

= pi (x+5)^2 x = pi (x^2 +10 x +25)x

= pi (x^3 + 10 x^2 + 25 x

= 1920 ????

if so then

x^3 + 10 x^2 + 25 x - 611.15 = 0

find roots:

http://www.mathportal.org/calculators/polynomials-solvers/polynomial-roots-calculator.php

Only real root is at x = 5.52

then r = 10.52

and h = 5.52

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