Pei lee enters a lift at the 30th floor of a complex. the lift stops temporarily after going down every 4 floors. at which floor is pei lee when the lift stops for the third time?

Find the length of the following tangent segments to the circles centered at o and o' whose radii are 5 and 3 respectively and the distance between o and o' is 12. what is the tangent segment of cd?

Aline parallel to a triangle's side splits ab into lengths of x - 5 and x + 2. the other side, ac, is split into lengths of x and x + 12. what is the length of ac? a) 12 b) 24 c) 36 d)

Factor the monomial completely 42a3b3