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

23%

every

11.69 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 (0.77)^{\frac{t}{11.69}}

M = 100 (0.77)^{t + 11.69}

M = 100 (0.23)^{\frac{t}{11.69}}

M = 100 (0.23)^{t + 11.69}