The following sum is a right Riemann sum with subintervals of equal length for the definite integral where a=5 and b=x 2.
Which statement best describes the integral sum shown?
a) It approximates the area under the curve using rectangles with right endpoints.
b) It calculates the exact area under the curve using trapezoids.
c) It underestimates the area under the curve.
d) It overestimates the area under the curve.