Until 1995, the rules for three-digit area codes in the United States were as follows: The first digit could not be 0 or 1. The second digit had to be 0 or 1. The third digit had no such restrictions. In 1995, the restriction on the second digit of area codes was removed. How many area codes are possible after the restriction is removed?

which expression represents the approximate length of bc?

step-by-step explanation:

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9

b

step-by-step explanation:

c) the median for town a 30" is greater than the median for town b 25"

step-by-step explanation:

town a, median = q2 = 30

town b, median - q2 = 25

so the median for town a 30" is greater than the median for town b 25"