The Decay Constant for Strontium 90 Is λ = 0 $\mathrm { P } _ { 0 }$

question 6

Short Answer

The decay constant for strontium 90 is λ = 0.0244, where the time is measured in years. How long will it take for a quantity $\mathrm { P } _ { 0 }$ of strontium 90 to decay to $\frac { 1 } { 3 }$ its original size?
Enter your answer exactly in the form $\frac { \ln a } { \mathrm {~b} }$ where a is a reduced fraction and b is a real number to four decimal places (no units).

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Definitions:

Stock Beta

A gauge for assessing the risk or volatility inherent in a security or portfolio against the entire market's movements.

Risk-free Interest Rate

The theoretical rate of return of an investment with zero risk of financial loss, often represented by the yield on government bonds.

Two-factor Model

A financial model that considers two sources of risk in its valuation or pricing, typically used in evaluating or predicting financial returns.

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