Finding which number supports the idea that the rational numbers are dense in the real numbers? a fraction between x/2 and x/3
an integer between –11 and –10
a whole number between 1 and 2
a terminating decimal between –3.14 and –3.15

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.