Question

A dangerous radioactive material is to be used in a medical procedure on patient Z.

• The half-life of the material is six hours.

• At 9am Monday morning a sealed capsule containing 100 grams of the material is delivered to the facility where the procedure is to be carried out.

• The capsule is to be administered to patient Z, when 75 grams of the material remain. When will that be? Explain.

• The remaining material is flushed out of patient Z, when 1 milligram of the material remains. When will that be? Explain.

Answer 1