Suppose marcus delivers papers at a rate of 9 papers in 18 minutes. how much longer would it take him to deliver 100 papers and 72 papers? justify your response.

Hello! So, when we find the unit rate by doing 18/9, Marcus delivers 1 paper every 2 minutes. To find out how long it take him to deliver 72 papers and 100 papers, multiply by the unit rate, which is 2. 72 * 2 is 144. It would take 144 minutes (2 hours 24 minutes) to deliver 72 papers. 100 * 2 is 200. It would take 200 minutes (3 hours 20 minutes) to deliver 100 papers. You find this by finding the unit rate, which is 1 paper delivered every 2 minutes. Then, we multiply the number of minutes by the number of papers dropped off. In case you need to read the answers better, here they are.

Amount of time to deliver:

72 papers: 144 minutes (2 hours 24 minutes)

100 papers: 200 minutes (3 hours 29 minutes)

Could you make it more clear?