Question 899375
{{{ (3.5/10^6)(225 - 30s + s^2) = (2.5/10^6)s^2)}}}
 {{{ ((3.5/10^6)/(2.5/10^6))(225 - 30s + s^2) = s^2}}}
{{{ (1.4)(225 - 30s + s^2) = s^2}}}
.4s^2 - 42s + 315