I need help! Btw who ready for thanksgiving break!!!

Use the function f(x) is graphed below. the graph of the function to find, f(6). -2 -1 1 2

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.

1: 4 if the wew 35 surfboards at the beach how many were short boards?