The end of a hose was resting on the ground, pointing up an angle. Sal measured the path of the water coming out of the hose and found that it could be modeled using the equation f of x is equal to negative 0 point 3 x squared plus 2 x , where f of x is the height of the path of the water above the ground, in feet, and x is the horizontal distance of the path of the water from the end of the hose, in feet. When the water was 4 feet from the end of the hose, what was its height above the ground?
Substitute x = 4 into the height equation: f(4) = −0.3(4²) + 2(4). Since 4² = 16, the height is −0.3 × 16 + 8 = −4.8 + 8 = 3.2 feet. The correct choice is 3.2 feet.
AI-written and checked against the verified answer.