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Mom is 60 years old and daughter is half mom's age. how old was daughter when mom was 4 times her age?
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Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?
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Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?
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Mom is 60 years old and daughter is half mom's age. how old was daughter when mom was 4 times her ag...
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