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In the model (P(t)=p+14t), (P(3)=96) and (P(s)=180). What is (s)?

Answer and explanation

Correct answer: 9

Given \(P(t)=p+14t\), we have \(P(3)=p+14\times3=p+42=96\), so \(p=54\). Now using \(P(s)=180\), \(54+14s=180\). Thus, \(14s=126\) and \(s=9\). If \(s=8\), the model gives 166, not 180. Exam tip: first find the constant term \(p\) from the known value, then solve for the required input.

Related tags

Linear PolynomialLinear GrowthSubstitutionSolving EquationsGrade 9 MathematicsLinear Growth And DecayIntroduction To PolynomialsMathematics

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