A short-lived medical isotope is administered to a patient

PHYSICS · Single correct · A Level · Physics · Nuclear physics · Nuclear physics

Problem

A short-lived medical isotope is administered to a patient. After

48\,\text{h}

, measurements show that only

35\%

of the initial activity remains. The patient may be released once the activity falls to

10\%

of the original value. Approximately how many additional hours must pass before the patient can be released? (a)

63\,\text{h}

(b)

57\,\text{h}

(c)

106\,\text{h}

(d)

44\,\text{h}