Answer:
16.07 milligrams
Step-by-step explanation:
From the question,
Using the formula of radioactive decay,
R/R' = 2ᵃ/ᵇ..................... Equation 1
Where R = Original mass of the polonium-210, R' = Final mass of polonium-210 after decaying, a = Total disintegration time, b = half life of polonium-210.
Make R' the subject of the equation
R' = R/(2ᵃ/ᵇ)................ Equation 2
Given: R = 100 milligrams, a = 1 years = 365 days, b = 138.39 days
Substitute these values into equation 2
R' = 100/(2³⁶⁵⁰⁰/¹³⁸³⁹)
R' = 100/(6.222)
R' = 16.07 milligrams of plonium-210
The answer is 96
24 pieces of wood all cut in half so multiply by 2
24x2=48
Now cut 48 pieces in half so multiply by 2
48x2=96
Answer:
B
Step-by-step explanation:
it's (m+n-1) √p
hope this helps
X= 2.5 2.75 divided by 1.10 =2.5
Answer: lxw its 72
Step-by-step explanation:
