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You need to use trigonometry, and square all of the numbers, you then add the lowest two and they should sum to the other number.
The set that this works for is the correct set.
Hope this helps x
Answer:
212.9 years
Step-by-step explanation:
Given that the half-life of cesium-137 is 30 years. Suppose we have a 170 mg sample
P0 = 175
P(30) = 87.5
So we can write equation as
b) After 60 years t = 30
In 30 years it becomes half and hence in 60 years it would become 1/4
i.e. 
mg
c) If P(t) =1, let us find t
212.9
Answer: 9
Step-by-step explanation:
We know that he can walk one mile in 1/3 of an hour. We can divide 3 by 1/3.
3/(1/3) When dividing by a fraction, we multiply its reciprocal instead.
3*3=9. This means that he can walk 9 miles in 3 hours.
700*600=420,000
420,000/10=42,000
Diameter = 25
so radius = 12.5
Pi*12.5^2=625/4Pi
42,000/625/4 Pi =86.56169741
=86.6
she can fit 86 tins
