Use the approximate half-life formula for the case described below. Discuss whether the formula is valid for the case described. Poaching is causing a population of elephants to decline by 8 % per year.

What is the half-life for the population in years? ____

If there are 10,000 elephants today, how many will remain in 50 years? ____

Does the approximate half-life formula give a valid approximation in the case described? No ? Yes ? ____