What is the approximate area, in square feet, of a circle with a diameter of 6 feet?

This is so hard and it’s for a test

Which values of p and q result in an equation with exactly one solution? px-43=-42x+q choose all answers that apply: a) p=-43 and q=-43 b) p=42 and q=43 c) p=43 and q=−42 d) p=42 and q=42

How many terms does the polynomial x^2 y^2 have