If the sum of the interior angles of a polygon is 1,440°, then the polygon must be

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown