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Math·Advanced Math·Nonlinear functions

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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?

A

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

B

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

C

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

D

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