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Kevin can clean a large aquarium tank in about 7 hours When Kevin and Lara work together they can clean the tank in 4 hours

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Kevin can clean a large aquarium tank in about 7 hours When Kevin and Lara work together they can clean the tank in 4 hours Write and solve a rational equation to determine how long to the nearest tenth of an hour it will take Lara to clean the tank if she works by herself Explain whether the answer is reasonable Round to the nearest tenth of an hour

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