Easy
Melanie began studying a sample of the chemical element einsteinium-253, which naturally loses its mass over time.
The relationship between the elapsed time, , in days, since Melanie started studying the sample, and the total mass remaining in the sample, , in micrograms, is modeled by the following function:
Complete the following sentence about the daily percent change in the mass of the sample.
Every year, of mass is subtracted from the total mass of the sample.
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