Does anyone understand this?

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

How do you find the area of a triangle

Plz hurry finals a paper cup in the shape of an inverted cone is 8 inches tall and has a radius of 1.5 inches. how much water can the cup hold? use 3.14 for pi. round the answer to the nearest tenth. a) 12.6 cubic in. b) 18.8 cubic in. c) 37.7 cubic in. d) 56.5 cubic in.