The function f(x) = -2x +6 is defined on the interval [0,3]. By partitioning [0,3] into 3 sub intervals of equal length and choosing u as the left endpoint of each sub interval. Approximate the area under the function from 0 to 3

Amodel rocket is launched from a roof into a large field. the path of the rocket can be modeled by the equation y = -0.04x^2 + 8.6x + 4.8, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground. how far horizontally from its starting point will the rocket land? a. 0.56 m b. 215.56 m c. 431.11 m d. 215.74 m