SOLUTION: determine how long the cannon ball was in the air. using h=-5t(squared)+ 40t+ 3

Question 240171: determine how long the cannon ball was in the air.
using h=-5t(squared)+ 40t+ 3

Answer by philline_palana(20) (Show Source): You can put this solution on YOUR website!

Solved by pluggable solver: SOLVE quadratic equation with variable

Quadratic equation (in our case ) has the following solutons:

For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=1660 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: -0.0743097574926722, 8.07430975749267. Here's your graph:

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