<h2>
Hello!</h2>
The answer is:
The ball will hit the ground after 
<h2>
Why?</h2>
Since we are given a quadratic function, we can calculate the roots (zeroes) using the quadratic formula. We must take into consideration that we are talking about time, it means that we should only consider positive values.
So,

We are given the function:

Where,

Then, substituting it into the quadratic equation, we have:

Since negative time does not exists, the ball will hit the ground after:

Have a nice day!
3/8*12/7 = 36/56 = 9/14 (simplify)
A. -4, because every time you multiply negative 4 with the preceding number, you get the next number in the sequence.
Rocky because of the product rule which says that when multiplying two terms with the same base you add the exponents.
The two numbers are 3 and 21, because 3 x 21 = 63 and 3 + 21 = 24.