The function f(x) = 16(.90)x represents exponential decay, where the base of the exponential function is 0.90 (which represents a decrease of 10%) and x represents the number of months.
Therefore, the amount of radioactive substance decreases 10% per month.
An artifact was found with a radioactive substance present. The function f(x)=16(.90)x can be used to determine the amount of the substance remaining after x months.
Based on the function, the amount of radioactive substance decreases _____% per month.
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