Aroom is 15 feet long, 13 feet wide, and 10 feet high. the walls, ceiling, and floor are all to be painted the same color. how many square feet are to be painted?

Radii ok and nl are perpendicular to om because of the radius-tangent theorem. by definition of perpendicular, angles kom and lnm are right angles. this means that triangles kom and lnm are right triangles. angle lmn is common to both right triangles, so by the triangles kom and lnm are similar.

Nine more than four times a number is the same as one less than twice the number. find the number?

Four congruent circular holes with a diameter of 2 in. were punches out of a piece of paper. what is the area of the paper that is left ? use 3.14 for pi