CPM Homework Help : CALC Problem 2-26

Let $A(f, 5 ≤ y ≤ 7)$ represent the area between the function and the $y$ -axis, between the horizontal lines $y = 5$ and $y = 7$ . If $f(x) = 2x + 3$ , find $A(f, 5 ≤ y ≤ 7)$ .

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