Respuesta :
The answer is 10 days
Explanation: 250 is half of 500, so only one half life has passed. One half life of co-57 is 10 days. So, the answer is 10 days.
please mark brainliest
The answer is 10 days
Explanation: 250 is half of 500, so only one half life has passed. One half life of co-57 is 10 days. So, the answer is 10 days.
please mark brainliest