🎴 Flashcard Mode
math & puzzles Online Quiz - 106
Card1 / 9
Mastered0
Review0
QuestionClick to flip
Madagascar Island, there are x dodos in a particular year. 30 dodos in a thousand of the original population die every year and 25 dodos in a thousand of the original population are born every year. In how many years will the population of dodos halve itself ?
AnswerClick to flip back
A
100
💡 Explanation:
Net change is 25 - 30 = -5 per 1000, or -0.5% per year. To halve (50% reduction) via linear reduction of the original population: 50 / 0.5 = 100 years.