A researcher observes a sample of a nuclide. An exponential model est…

Question

Prompt

A researcher observes a sample of a nuclide. An exponential model estimates that the mass, in grams, of the sample decreases by

22%

every

11.11

minutes. Which of the following equations could represent this model, where

M

is the estimated mass, in grams, of the sample

t

minutes after the researcher began observing the sample?

M = 100 (0.22)^{t + 11.11}

M = 100 (0.22)^{\frac{t}{11.11}}

M = 100 (0.78)^{t + 11.11}

M = 100 (0.78)^{\frac{t}{11.11}}