The bottom of a ladder must be placed 5 feet from a building. the ladder is 14 feet long. how far above the ground does the ladder touch the wall?

Alake near the arctic circle is covered by a sheet of ice during the cold winter months. when spring arrives, the ice starts to melt. s(t) models the ice sheet's thickness (in meters) as a function of time tt (in weeks). s(t)=-0.25t+4

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

Anyone know? will mark brainliest if correct!