What is the rate of change of and what does it represent 75÷1

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

Noor brought 21 sheets of stickers. she gave 1/3 of a sheet to each of the 45 students at recess. she wants to give teachers 1 1/2 sheets each.