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Simplify: (8 x^(-2) y^3)/(4 x^(1/2)y^(-2))
Benita runs for 500 meters every day. After 10 days, how many kilometers has Benita run?
The time it takes me to wash the dishes is uniformly distributed between 7 minutes and 17 minutes. What is the probability that washing dishes tonight will take me between 9 and 10 minutes?

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