Let Q Represent a Mass of Radioactive Radium (²²⁶Ra) (In

question 33

Multiple Choice

Let Q represent a mass of radioactive radium (²²⁶Ra) (in grams) , whose half-life is 1599 years. The quantity of radium present after t years is Determine the quantity present after 300 years. Round to the nearest hundredth of a gram.

• A) 0.00 g
• B) 0.47 g
• C) 5.00 g
• D) 4.39 g
• E) 0.88 g

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Definitions:

Seasonal Multiplicative Model

A time series forecasting method that accounts for multiplicative seasonal variations in the data.

Holt-Winters Additive Model

A forecasting technique that extends exponential smoothing to capture seasonality and trend in time series data.

Seasonality

Periodic fluctuations in data or phenomena that occur regularly based on a season, quarter, month, etc.

Mean Absolute Deviation

The average of the absolute differences between each data point and the mean of the data set.