Neco 2021 Agricultural Science Question 22
Practice objective / multiple choice question 22 from the 2021 Neco Agricultural Science examination.
A \(5\)-ha maize field is infested with stem‑borer larvae at a density of \(12\) larvae per square metre. A pesticide reduces the larval population by \(40\%\) immediately after application. However, each subsequent weekly application loses \(15\%\) of the previous efficacy (i.e., the percentage reduction is multiplied by \(0.85\) each week). If the farmer applies the pesticide once a week for three weeks, what is the expected total number of larvae remaining after the third application? Round to the nearest whole larva.
Answer Options
About This Question
This is Neco 2021 Agricultural Science Question 22. It is one of the objective questions from the 2021 Neco Agricultural Science examination.
Difficulty level: Medium .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.