Answer:
It is s +144=290
Step-by-step explanation:
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Decay rate for Radium-228 is 0.01205
Step-by-step explanation:
The half life of radium-228 is 5.75 years. We need to find the decay rate for radium.
The formula used is:

Where N₀ = amount of radioactive particles at time = 0
N_t = amount of radioactive particles are time (t)
λ = rate of decay constant
t = time
We are given half life so,
=0.5
t= 5.75 years
We need to find λ
Putting values in formula and solving:


So, Decay rate for Radium-228 is 0.01205.
Keywords: Decay Rate
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Answer: The answer is (49.08,1.1)
Step-by-step explanation:
-44.54-4.54= -49.08
4.7-3.6= 1.1
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