A spinner has six equal-sized sections numbered 1, 1, 2, 2, 3, and 4. What is the sample space for the spinner? A. {1, 2, 3, 4}
B. {4, 3, 2, 1}
C. {1, 2, 2, 3, 4}
D. {1, 1, 2, 2, 3, 4}

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.