Cobalt - 60 Has a Half-Life Equal TO₅

question 75

Multiple Choice

Cobalt - 60 has a half-life equal tO₅ .3 years. What fraction of cobalt - 60 remains undecayed after 21.2 years?

• A) 0.000
• B) 0.0625
• C) 0.125
• D) 0.250
• E) 0.500

---

Definitions:

Present Value

The immediate worth of a prospective sum of money or sequence of cash flows, with a defined yield rate factored in.

Market Rate Of Interest

The prevailing rate of interest observed in the marketplace for securities or loans, influenced by factors such as supply and demand, inflation, and monetary policy.

Renewable Resources

Natural resources that can be replenished naturally over time, such as solar energy, wind, and biomass.

Nonrenewable Resources

Natural resources that cannot be replenished at the same rate at which they are consumed.