Question

Quadratic Equation Question

Answer 1

Answer: 0.68 or 13.92

Explanation:

If the height is 47 meters, then the height, h, is equal to 47.

`47=73t-5t^2\\\\5t^2 - 73t+47=0`

Using the quadratic formula,

`t=\frac{-(-73) \pm \sqrt{(-73)^(2)-4(5)(47)}}{2(5)}\\\\\\t=(73 \pm √(4389))/(10)\\\\\\ t=(73+√(4389))/(10), (73-√(4389))/(10)\\\\\boxed{t \approx 0.68, 13.92}`