Answer:
(i) Approximately 3 half lifes
(ii) 
Step-by-step explanation:
(i) ∵ The half life of Radon-222 is approximately 3.8 days,
So, the number of half life in 11.46 days =
≈ 3
(ii) Since, the half life formula is,

Where,
= initial quantity,
t = number of periods
= half life of the quantity,
Given,
N = 
t = 11.46 days,



Answer:
could you type that again? I don't understand
Answer:
-19
Step-by-step explanation:
36 is 24 less than 60 so that means they subtracted to get 36 so subtract 24 from five and boom -19
Answer:
area is 200.96 ft^2
circumference is 50.24 ft