Question 268286
A.) just use the quadratic formula on the equation you generated and solve for t
___ watch the signs (your equation has an incorrect sign for the coefficient of the squared term)


B.) substitute zero for S in the original equation (S= -2.7t^2 + 30t + 6.5) and use the quadratic formula


check the solutions for t to see if they make sense
___ A should have two solutions (upward and downward)
___ B should have one solution (negative value not realistic)