Waec Model Questions Vol1 2022 Agricultural Science Question 4
Practice objective / multiple choice question 4 from the 2022 Waec Model Questions Vol1 Agricultural Science examination.
A pest population on a farm follows $P(t)=P_0e^{kt}$ where $P_0=200$ insects/ha at $t=0$ weeks and $k=0.3$ per week. The economic injury level (EIL) is 800 insects/ha. A pesticide costs ₦50,000 per hectare and reduces the population by 90% instantly. Each insect above the EIL causes a loss of ₦200. The farmer can apply the pesticide only once. In which week should the pesticide be applied to minimise the total cost (pesticide cost plus loss)?
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About This Question
This is Waec Model Questions Vol1 2022 Agricultural Science Question 4. It is one of the objective questions from the 2022 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Hard .
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