Each interior angle of a regular n-gon measures 156º.
How many sides does the n-gon have?

Aportion of a line bounded by two points is defined as

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.

Can someone me do math because i am having a breakdown rn because i don’t get it