$\int_0^4 (x - x^2)\,dx$ equals:
A$-40/3$
B$8$
C$40/3$
D$-8$
Answer & Solution
Correct answer: A. $-40/3$
Antiderivative: $x^2/2 - x^3/3$. Evaluate: $[x^2/2 - x^3/3]_0^4 = (16/2 - 64/3) - 0 = 8 - 64/3 = (24-64)/3 = -40/3$.
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