A sample of 800 grams of iodine-131 is decaying at a continuous yearly rate of 8.7%.
a. Find a function giving the amount present as a function of t in years.
b. How much will be present in 2 years? Round your answer to the nearest whole gram.
c. How much will be present in 50 years? Round your answer to the nearest whole gram.
d. How long will it take for there to be only 1 gram remaining? Give both the exact value and its four-decimal-place approximation.
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