The half-life of radium is 1690 years. If 20 grams are present now, how much will be present in 250 years?
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For this case we have that by definition, the volume of a cuboid is given by:
Where:
L: It's the long
A: It is the width
h: It is the height
According to the problem data we have:
So, the volume of the cuboid is:
Finally, the volume of the cuboid is:
Answer: