If (T(t)=140-10t), what is the value of (T(2)-T(6))?
Answer and explanation
Correct answer: 40
Given T(t)=140-10t, we get T(2)=140-10(2)=120 and T(6)=140-10(6)=80. Therefore, T(2)-T(6)=120-80=40. The value 60 can result from an incorrect subtraction or an error while evaluating the 10t term. Exam tip: Substitute each value of t separately first, then subtract the two function values.
Frequently asked questions
What is the correct answer to this question?
40
Why is this the correct answer?
Given T(t)=140-10t, we get T(2)=140-10(2)=120 and T(6)=140-10(6)=80. Therefore, T(2)-T(6)=120-80=40. The value 60 can result from an incorrect subtraction or an error while evaluating the 10t term. Exam tip: Substitute each value of t separately first, then subtract the two function values.
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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