Sarah made two dozen
cookies for hoodie hoo
day. she drew faces on
them with bright red
icing. the
circumference of each
cookie is 12.56
centimeters. what is the
radius of each cookie?

6.28 cm

Explanation: The radius of a circle is half of the diameter, therefore you divide the diameter by two to find the radius.

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.