Certain radioactive material decays in such a way that the mass remaining after t years is given by the function:

m(t)=365e^−0.05t

Where m(t) is measured in grams.
When, t=0? and how much of the mass remains after 50 years?

Question

Certain radioactive material decays in such a way that the mass remaining after t years is given by the function:

m(t)=365e^−0.05t

Where m(t) is measured in grams. 
When, t=0? and how much of the mass remains after 50 years?

zale101 · Answer

When, t=0?  Plug in t=0 and the result is your grams
 How much of the mass remains after 50 years? T is time, plug t=50 in m(t)=365e^−0.05t, your result is your grams