## Algebra 2 (1st Edition)

$\approx37.46$ cm
Plugging in $r=7.5,L=900$ into the formula we get: $900=\pi(7.5)\sqrt{(7.5)^2+h^2}\\38.2\approx\sqrt{56.25+h^2}\\1459.24\approx56.25+h^2\\h^2\approx1402.99\\h\approx37.46$