If m ∠ ∠ ∠ ∠ 3 = 7x + 40 and m ∠ ∠ ∠ ∠ 4 = 2x + 23, find m ∠

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.

Me d is also an option but i couldn't get it in the picture

What is the approximate value of the correlation coefficient for the given graph? a. 1 b. 5 c. 3 d. -1