The chemical element einsteinium-253 naturally loses its mass over time. A sample of einsteinium-253 had
an initial mass of 540 grams when we measured it.
the sample
The relationship between the elapsed timet, in months, and the mass, M(t), in grams, left
is modeled by the following function:
1
2.05
M(t) = 540
8
Complete the following sentence about the rate of change in the mass of the sample.
7
The sample loses
of its mass every
months.