Complete the sentence.

Twenty-one is 25% of __

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan for ?

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).