Suppose the decay for a radioactive element is known to be y=y e^-0.24t, with t in years. About how long will it take for a sample of this element to decay to 70% of its original amount?
Suppose the decay for a radioactive element is known to be y=y e^-0.24t, with t in years. About how long will it take for a sample of this element to decay to 70% of its original amount?
I assume you mean .
The initial amount is . So substitute and solve for :