The half-life of the radioactive substance is 67.95 hours.
Answer:
AC = 17.3
Step-by-step explanation:
AC = √c2 - b2
= √18.6862701378782 - 72
= √300.17669166575
= 17.32561
= 17.3
Answer: 53
265 divided by 5=
53
hope this helps
Answer:
52
this is most likely the correct answer