Question

a sample of a radioactive isotope emits at a rate of 240 per minute. After 48 hours the rate of emission has decreased to 15 per minute.

What is the half-life of the radioactive material?

A.4h
B.8h
C.12h
D.16h

Explanation please

Answer 1

Respuesta:

Lo copie de otra parte :c pero espero que te sirva