Calculus BC NEED HELP ASAP PLEASE!

Question

Using n = 4 equal-width rectangles, approximate  . Use the right end-point of each sub-interval to determine the height of each rectangle. 

Answer 1

Δx = (2 - (- 2))/4 = 1

≈ (((- 1)³ + 8) + (0³ + 8) + (1³ + 8) + (2³ + 8))·1 = (7 + 8 + 9 + 16)·1 = 40