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(100 points) Alice and Bob are standing next to each other. Alice faces east while Bob faces north. They begin to walk. Alice walks at

(100 points) Alice and Bob are standing next to each other. Alice faces east while Bob faces north. They begin to walk. Alice walks at a rate of 1 m/s. Bob walks at a rate of 2 m/s. After 8 seconds, what is the rate at which they are moving away from each other?

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