Answer and explanation

Correct answer: C. 2

  1. Step 1: .
  2. Step 2: Evaluate: .
Answer
2.
Why not the others: Dividing by multiplies by 2, not by 1; the sign of the antiderivative is negative so the result is positive; 4 uses the wrong angle.

Practise more Calculus: Anti-differentiation and Areas Under Curves.

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