I NEED HELP PLEASE I DON’T WANT TO FAIL PLEASE PLEASE HELP ME

()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

The sales tax rate is 7.25%. how much tax in dollars is added on an item that costs $56.00? a. $4.06 b. $7.25 c. $14.50 d. $60.06

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'