Identify the arc length of tv in terms of π. (image is attached)

the answers for this question were:

≈0.67pi in., ≈1.83pi in., ≈3.67pi in., or ≈1.33pi in.

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

The function show two sisters' savings account and the rate at which they plan to deposit money

I’m really confused and need your assist me with this question i’ve never been taught