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If (R(t)=b-10t) and (R(0)=75), what is (b)?

Answer and explanation

Correct answer: 75

Given \(R(t)=b-10t\). Substituting \(t=0\) gives \(R(0)=b-10(0)=b\). Since \(R(0)=75\), \(b=75\). Option 65 could be the value of \(R(1)\), not the initial value. Exam tip: in a linear expression, substituting \(t=0\) gives the constant term, or initial value.

Related tags

PolynomialsLinear ExpressionInitial ValueLinear DecaySubstitutionLinear Growth And DecayIntroduction To PolynomialsMathematics

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