Answer: 
Step-by-step explanation:
Let be "x" the percentage of apples that were actually good for consumption.
You know that total number of apples the farmer harvested was 270 apples.
Then, you can identify that 270 apples represents the
You know that 80 of them were unfit for consumption, so the number of apples that were good for consumption was:

Then, you can set up the following proportion in order to find the percentage of apples that were actually good for consumption:

Finally, you must solve for "x" in order to find its value. This is:

Parabola form : (y-k) = a(x-h)², where h and k are the vertex(h , k)
The vertex is given (2 , - 9), the equation of the parabola becomes:
y+9 = a(x-2)²
But we know this curve passes through (5, - 18)
Plug the respective values of x & y in the equation:
-18 +9 = a(5-2)² → - 9 = 9a & a = -9/9 and a= - 1
Let's use the quadratic formula

a = 1, b = 0, c = -18

This is now split into two equations:

and

Since

The answer is

which means there are 2 real number solutions to the problem: answer B.
54,300 you multiple by 4 to get 100% and you get 54,300