Answer:I think the answer is c
Step-by-step explanation:
Answer:
40%
Step-by-step explanation:
20% + 20% = 40%
Hope this helps!
If you could move the photo a little I can answer it
Given:
Initial mass, m₀ = 23 g
Decay constant, k = 0.13
Exponential decay obeys the equation

where t = time, days
For half life, the mass is m = m₀/2.
Therefore

Answer: The half life is 5.33 days