The answer is 8, hope this helps :)
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Answer:

Step-by-step explanation:
The interval of interest becomes the limits of integration. ∆x becomes dx, and the xi are replaced by the variable of integration, x.
It’s the last one. b < c < a
Answer:
i dont speak or type spanish
Step-by-step explanation:
I just ask this question on the SnapCalc app the answer is in the image