If (A(t)=9+7t), what is the value of (A(t)) at (t=3)?
Answer and explanation
Correct answer: 30
Given \(A(t)=9+7t\). Substituting \(t=3\), we get \(A(3)=9+7\times3=9+21=30\). Hence, the correct answer is 30. The value 21 is only \(7\times3\); the constant term 9 must also be added. Exam tip: To evaluate a function, replace the variable with the given value and simplify step by step.
Frequently asked questions
What is the correct answer to this question?
30
Why is this the correct answer?
Given \(A(t)=9+7t\). Substituting \(t=3\), we get \(A(3)=9+7\times3=9+21=30\). Hence, the correct answer is 30. The value 21 is only \(7\times3\); the constant term 9 must also be added. Exam tip: To evaluate a function, replace the variable with the given value and simplify step by step.
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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