If (K(t)=110-11t), what is (K(5))?
Answer and explanation
Correct answer: 55
Given \(K(t)=110-11t\). Substituting \(t=5\), \(K(5)=110-11(5)=110-55=55\). Therefore, the correct answer is 55. The value 66 would result only if the amount subtracted were 44, but here \(11\times 5=55\). Exam tip: When evaluating a function, substitute the given value for the variable using brackets.
Frequently asked questions
What is the correct answer to this question?
55
Why is this the correct answer?
Given \(K(t)=110-11t\). Substituting \(t=5\), \(K(5)=110-11(5)=110-55=55\). Therefore, the correct answer is 55. The value 66 would result only if the amount subtracted were 44, but here \(11\times 5=55\). Exam tip: When evaluating a function, substitute the given value for the variable using brackets.
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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