Brainliest if right the image represents what geometric construction? a) copy an angle construction b) parallel lines construction c) copy a segment construction d) perpendicular from a point not on the line

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 parabola opens: y=√x-4 (principal square root) up down right left

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much