The distance between the two cars is decreasing at a rate of ___km/h when tansy’s car is 6km from the intersection and Eva’s car is 8km from the intersection.

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Tanya is driving east at 100km/h and Eva is driving north at 80km/h. Both cars are approaching the intersection of the two roads. The distance between the two cars is decreasing at a rate of ___km/h when tansy’s car is 6km from the intersection and Eva’s car is 8km from the intersection. Do not record units with your answer and round to nearest tenth if necessary. Derivative application question!
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