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An exponential decay function can be used to model the number of grams of a radioactive...

An exponential decay function can be used to model the number of grams of a radioactive material that remain after a period of time.​ Carbon-14 decays over​ time, with the amount remaining after t years given by y=y 0 e Superscript negative 0.00012378 ty=y0e−0.00012378t​, where y0 is the original amount. If the original amount of​ carbon-14 is 450450 grams, find the number of years until 346346 grams of​ carbon-14 remain.

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