



 
Hi Roselyn, Jenny travels at 35 km/hr for 15 minutes before Mark leaves. 15 minutes is a quarter of an hour so how far apart are they at 8:15? How much further do they have to go before they are 40 kilometers apart? After 8:15 how rapidly is the distance between them changing? At that rate how much time is needed until they are 40 kilometers apart? Check your answer,  


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