(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I have to approximate the integral of sin(sqrt(x)) from 0 to 40, with n=4, using the midpoint rule.

2. Relevant equations

3. The attempt at a solution

I found delta x to be 10, obviously, since I have to approximate from 0 to 40 using 4 large rectangles. I am having trouble finding f(.5(x(of i-1)+x(of i)))). I don't really even know where to start!

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# How do I use the midpoint rule to approx integral sin(sqrt(x)) from 0 to 40

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