Complete the statement:

()1. how do you find range? 2.the following set of data is to be organized into a histogram. if there are to be five intervals on the graph, what should the length of each interval be? 30, 34, 23, 21, 27, 25, 29, 29, 25, 23, 32, 31

How many $20 bills do you need to have to make $280

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?