Answer:
121 – 1 = 120. 120 – 3 = 117.
Step-by-step explanation:
8 + 3(16-12)
8 + 3(4)
8 + 12
20 is your answer
hope this helps
Answer:
The half life of the radioactive substance is 277 hours.
Step-by-step explanation:
initial mass, No = 100 mg
mass decayed = 2% = 2 mg
Mass remained , N = 98 mg
time, t = 8 hours
Let the half life is T.
Use the equation of radioactivity
Answer:
the answer is 32 million this is because 8*2 is 16 and 16*2 is 32, you get the answer bc every 21 min it doubles hence the answer is 32 in millions