An 80 mg sample has a half-life of 5 days. How much remains after 15 days?
Answer and explanation
Correct answer: A. 10 mg
- Step 1: 15 days divided by 5 days gives 3 half-lives. Step 2. . Answer: 10 mg. Why not the others: Three halvings are needed, not one or two.
Practise more Functions, logarithms and polynomials.
Free questions with an explanation for every one, and full timed Alberta Diploma Exams mock tests.