The activity of a radioactive sample is measured as No counts per minute at t=0 and No/e counts per minute - Physics - Nuclei

Question

The activity of a radioactive sample is measured as No counts
per minute at t=0 and No/e counts per minute at t=5 minutes The
time (in minutes) at which the activity reduces to half its value
is
1-5loge2 2-loge2/5
3-5/loge2 4-5log10(5)

Ravi Gupta · Accepted Answer

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The activity of a radioactive sample is measured as No counts per minute at t=0 and No/e counts per minute at t=5 minutes. The time (in minutes) at which the activity reduces to half its value is 1-5loge2 2-loge2/5 3-5/loge2 4-5log10(5)

The activity of a radioactive sample is measured as No counts per minute at t=0 and No/e counts per minute at t=5 minutes. The time (in minutes) at which the activity reduces to half its value is

1-5loge2 2-loge2/5

3-5/loge2 4-5log10(5)