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Question
Difficulty Level:

Medium

MCQ

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 relationship between the elapsed time tt, in months, and the mass, M(t){M}({t}), in grams, left in the sample is modeled by the following function: M(t)=540(18)t2.05M(t)=540 \cdot(\frac{1}{8})^{\frac{t}{2.05}}

Complete the following sentence about the rate of change in the mass of the sample.

The sample loses 78\frac{7}{8} of its mass every months.

Select all that apply :

2.052.05

2.52.5

1.251.25

7/87 / 8

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