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Please attach solution 9. Bike A is approaching an intersection at 12 km/h. At the same time, bike B is leaving the same intersection at

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9. Bike A is approaching an intersection at 12 km/h. At the same time, bike B is leaving the same intersection at 6 km/h. At what rate is the distance between the two bikes changing when bike A is 8 km from the intersection and bike B is 15 km from the intersection? Is the rate increasing or decreasing? (3 marks) A B

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