Waec Model Questions Vol1 2017 Agricultural Science Question 29
Practice objective / multiple choice question 29 from the 2017 Waec Model Questions Vol1 Agricultural Science examination.
Adoption of a new pest‑resistant maize variety follows the logistic model \(P(t)=\dfrac{K}{1+ae^{-bt}}\), where \(P(t)\) is the percentage adoption at year \(t\), \(K=80\%\) is the maximum attainable adoption, and \(a,b\) are constants. At the start (\(t=0\)) adoption is 5 %. After 3 years adoption has risen to 30 %. (a) Determine the growth constant \(b\) (to two decimal places). (b) Using this value, estimate the year when adoption will reach 70 % (give the answer to one decimal place).
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About This Question
This is Waec Model Questions Vol1 2017 Agricultural Science Question 29. It is one of the objective questions from the 2017 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Hard .
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