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Marcus spent $3.2to his car wash if one quarter operates 60 seconds . how long did it take him to wash his car

Marcus spent 32to his car wash if one quarter operates 60 seconds how long did it take him to wash his car class=

Respuesta :

768 seconds, or 12.8 minutes.  
3.2 divided by .25 (cost of a quarter)= 12.8 which means that he spent 12.8 quarters during the wash.  Each quarter is 60 seconds, so 12.8 times 60=768 seconds.