What is the purpose of this chart? a. to show the populations of the largest cities in the world b. to show the populations of major cities today c. to show the populations of major cities in 1500 d. to show the populations of major cities in europe

The wheels of a bicycle have a diameter of 70cm. how many meters will the bicycle travel if each wheel makes 50 revolutions

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42