A patient is given 0.050 mg of technetium-99 m (where m means metastable—an unstable but long-lived state), a radioactive isotope with a half-life of about 6.0 hours. How long until the radioactive isotope decays to 1.3×10−2 mg ?

we have a patient has given 0.0 50 mg of technetium 99 am where it means just met a stable and unstable but long live state. It's a radioactive isotope with a half life off point off six hours.

Explanation:

0.88m hope i am correct : )