A sample of a certain isotope takes 29 years to decay to half its ori…

Question

Prompt

A sample of a certain isotope takes 29 years to decay to half its original mass. The function

s (t) = 136 (0.5)^{\frac{t}{29}}

gives the approximate mass of this isotope, in grams, that remains

t

years after a 136-gram sample starts to decay. Which statement is the best interpretation of

s (58) = 34

in this context?

Approximately 34 grams of the sample remains 58 years after the sample starts to decay.

The mass of the sample has decreased by approximately 34 grams 58 years after the sample starts to decay.

The mass of the sample has decreased by approximately 58 grams 34 years after the sample starts to decay.

Approximately 58 grams of the sample remains 34 years after the sample starts to decay.