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If (V(t)=45-5t), what is (V(0))?
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Answer and explanation
Correct answer: 45
Given \(V(t)=45-5t\). Substituting \(t=0\), we get \(V(0)=45-5(0)=45\). Therefore, 45 is correct. The value 40 is obtained for \(t=1\), so it is a close but incorrect option. Exam tip: in a linear expression, the constant term gives the initial value at \(t=0\).
Frequently asked questions
What is the correct answer to this question?
45
Why is this the correct answer?
Given \(V(t)=45-5t\). Substituting \(t=0\), we get \(V(0)=45-5(0)=45\). Therefore, 45 is correct. The value 40 is obtained for \(t=1\), so it is a close but incorrect option. Exam tip: in a linear expression, the constant term gives the initial value at \(t=0\).
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Linear growth and decay.
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