Question

In Physics, a radioactive decay is a process in which an unstable atom spontaneously emits particles and radiation. Suppose a radioactive amount of Radium, R, that is present after t years is given by the following formula

R= Pe^-kt
P= the number of grams present intially
k= constant

Find k if 25% of Radium disappears after 120 years.

Answer 1

I got k= .002

Answer 2

Yes, that’s correct! : )

Answer 3

Thanks!