Let Q Represent a Mass of Radioactive Plutonium $\left( { } ^ { 239 } \mathrm { Pu } \right)$

question 28

Multiple Choice

Let Q represent a mass of radioactive plutonium $\left( { } ^ { 239 } \mathrm { Pu } \right)$ (in grams) ,whose half life is 24,100 years.The quantity of plutonium present after t years is $Q = 16 \left( \frac { 1 } { 2 } \right) ^ { t / 24,100 }$ .Determine the quantity present after 67,000 years.Round your answer to one decimal place. ​

• A)4.3 g
• B)3.3 g
• C)5.3 g
• D)2.3 g
• E)6.3 g

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Definitions:

Sample Proportion

The ratio or fraction of sample observations that belong to a particular category or characteristic.

Standard Deviation

A parameter for evaluating the breadth of dispersion or difference in a set of figures.

Sample Proportion

The fraction of items in a sample meeting a certain criterion, representing a subset of the population fraction with that characteristic.

Sample Mean

The average value of a sample set of numbers, calculated by adding up all the observations and dividing by the number of observations.