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A plant's height is (H(t)=18+4t) cm. What will be the height at (t=5)?

Answer and explanation

Correct answer: 38 cm

Given \(H(t)=18+4t\). Substituting \(t=5\), \(H(5)=18+4(5)=18+20=38\) cm. Hence, 38 cm is correct. Getting 32 cm would mean calculating the growth term \(4t\) incorrectly. Exam tip: To find a function value, substitute the given value for the variable and then simplify.

Related tags

Linear GrowthPolynomialsSubstitutionFunction ValueAlgebraic ExpressionsLinear Growth And DecayIntroduction To PolynomialsMathematics

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