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In 1990 the world reserves of aluminum ore stood at 75,000,000,000 tons. World use of aluminum that ...

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melina_rosy:
In 1990 the world reserves of aluminum ore stood at 75,000,000,000 tons. World use of aluminum that year was 100,000,000 tons, and the demand was growing exponentially at 10% per year. Assuming this growth rate continues, and no new deposits of ore are discovered, in what year will the world reserves of aluminum ore be exhausted?
◦ 2110
◦ 2033
◦ 2079
◦ 2058

emsimon14:
2033

cemason:
Wow! Thank you!

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