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## Homework Statement

Evaluate dA, where R is the rectangular region described in 0 ≤ x ≤ 10ln7 and 25 ≤ y ≤ 50

## Homework Equations

dA = dxdy or dA = dydx

## The Attempt at a Solution

I drew the rectangle on a Cartesian plane, but the problem is I don't know what the question is asking. I can set up a double integral with the limits they give me, but I don't understand how to calculate dA from any of the given information. Thanks for any clarity you can provide me.

Edit: Nevermind, it was Firefox not showing information about the question, I can solve it now that the full question is displayed.

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