Understanding the algebra problem

Question

A ball is thrown upward and outward from a height of 6 feet. The height of the ball, 𝑓(𝑥), in feet, can be modeled by 𝑓(𝑥) = −0.6𝑥^2 + 2.7𝑥 + 6 where 𝑥 is the ball’s horizontal distance, in feet, from where it was thrown. Explain fully any details of the problem that will be necessary to know to solve the problem. 

Answer 1

0 = −0.6𝑥^2 + 2.7𝑥 + 6

Can you solve for x and answer?