In the numeral 9,999,999, the final 9 is worth what fraction of the first? The slashes are the FRACTIONS A) 1/1,000,000

B) 1/100,000

C) 1/10,000

D)1/1000

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.

Cone a has a surface area of 384 ft2 and cone b has a surface area of 96 ft? . what is the ratio of their volume?

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?