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\$11,700 is invested in a compound interest account paying 3.9% compounded quarterly. How much will be in the account after 18 years? Round your answer to the nearest cent.

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evaluate
11700(1 + .039/4)^72

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23527.940563

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An isotope of protactinium undergoes radioactive changes at an exponential rate, having a half-life of 32,760 years. Determine the number of grams that will remain 2,000 years from a 120-gram sample using the function

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