The chemical element einsteinium-
naturally loses its mass over time. A sample of einsteinium-
had an initial mass of
grams when we measured it.
The relationship between the elapsed time
, in days, and the mass,
, in grams, left in the sample is modeled by the following function:
Complete the following sentence about the rate of change in the mass of the sample.
The sample loses
of its mass every
days.
