



 
Hi Joakim, I can help get you started. Think about the distance between the two cars. It goes from 162 km to 0 km in 2 hours so the distance between the cars is decreasing at a rate of $\large \frac{162}{2} \normalsize = 81 \mbox{ km/hr.}$ Can you complete the problem now? Write back if you need more assistance. Penny  


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