Arc Length of a Curve and Area Between Functions

I work through a calculator based question showing you how to find arc length of a curve and the area of a region bound by two functions.
Arc Length of a Curve 1:00
Area Bound Between Two Functions 8:15

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Past Exam Questions at APCentral:

[aashsyed]

10:03 you forgot the dx at the most most integral at the left.

[mzulzwg]

I want to ask you a question
If I want to learn mathematics from zero to the top
Can you please help me by giving me a plan to do that