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Erin can set up and burn a single CD on his computer in 3.5 minutes. At this rate, how long will it take Erin to set up and burn 20 of this same CD?

 May 31, 2020
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Erin can set up and burn a single CD on his computer in 3.5 minutes. At this rate, how long will it take Erin to set up and burn 20 of this same CD? 

 

          3.5  min         20  cd          70 min  

                 –—     x        –—   =  

                  cd                 1  

.

 May 31, 2020

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