Question

0.Initially 480 -particles per minute are being
emitted by a radioactive substance. This
number reduces to 240 after 2 hours. The
number of -particles being emitted per
minute after next 4 hour will be
(1) 0 (2)60 (3)80 (4)120




please explain how to solve this problem ​

Answer 1

Answer:

sorry

Explanation:

Answer 2

The answer is 60, if right mark me as brainliest please.