Mrs. Canter's math class went outside and plucked blades of grass and then measured them. The line plot shows what fraction of an inch 12 of the blades of grass were. What is the difference of the length of the shortest blade of grass and the length of the longest blade of grass? Write your answer as a mixed number in simplest form.

1 1/4

Step-by-step explanation: The shortest blade of grass is 2/4 of an inch. The tallest blade of grass is 7/4 inches.  You must subtract 7/4 by 2/4 to get the answer. Subtract the numerator of the tallest blade of grass by the smallest blade of grass. 7/4-2/4=5/4. When you convert that to a mixed number you get 1 1/4.

You payed for 18 months.

Step-by-step explanation:

420-60=360

360÷20=18