The width of each trapezoid is . Evaluate the bases of the trapezoid by calculating y = 4 − x^2 at the
appropriate endpoints. Following the rule, we get that the area is approximately
PROBLEM 4. Find the area under the curve y = 4 − x^2 from x = −1 to x = 1 using the Midpoint Formula
with n = 4.
Answer: Draw four rectangles that look like the following: