Question: Consider the function \(f\left( x \right)=60x{{e}^{-x}}\) on the interval [2, 9].

(a) Find \(\Delta x\) if n = 5

(b) List the midpoints of the 5 subintervals

(c) Use 5 midpoint rectangles to approximate the area between f(x) and the horizontal axis from x = 2 to x = 9.