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In surveying a beach, a geologist estimates that, starting from the present, the tons of sand on the beach will wash away at a rate of 5 percent every 5 years. The beach presently has 40,000 tons of sand.According to the geologist’s estimate, approximately how many tons of sand will remain after 15 years?

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In surveying a beach, a geologist estimates that, starting from the present, the tons of sand on the beach will wash away at a rate of 5 percent every 5 years. The beach presently has 40,000 tons of sand.<br>According to the geologist’s estimate, approximately how many tons of sand will remain after 15 years?






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