# Question #e8c1c

##### 1 Answer

1)

2)

#### Explanation:

1) If I'm correct, to solve the first question, we set

We set up an equation like this and solve for

You may have noticed that this isn't easy to solve by factoring but we can find the answer by using the quadratic formula:

We let

If we evaluate this into a calculator we will get two answers:

We can ignore the second answer because since we are talking about time, time can't be negative if we are initially starting when **Therefore, the ball will hit the ground at approximately #3.87# seconds (#4# seconds if you want to be loose about it)**

2) For this question we simply substitute

**After some algebra...**

P.S. It's good to always visualize the problem. Below is what the path of the ball looked like given by the function in the problem:

graph{-16x^2+60x+6 [-6.7, 153.3, -16.6, 63.4]}