Question

HARDEST INTEGRAL Calculus Problem EVER?
The function r(t) represents the rate at which a country's debt is growing. Consider the following expressions:
The function r(t) represents the rate at which a country's debt is growing. Consider the following expressions:

A. ∫19892001r′(t)dt
B. [ r(2001)−r(1989)/2001−1989]
C. r(2001)−r(1989)
D. r(2001)
E. ∫19892001r(t)dt
_________________________________
and interpretations:

A. Average rate of change of the debt rate between 1989 and 2001
B. Change in debt rate between 1989 and 2001
C. Increase in debt between 1989 and 2001
D. Debt of