If (P(t)=90-3t), what is the value of (P(0)-P(12))?
Advertisement
Answer and explanation
Correct answer: 36
Here, P(0)=90-3(0)=90 and P(12)=90-3(12)=54. Therefore, P(0)-P(12)=90-54=36. Option 30 is incorrect because multiplying the decrease rate 3 by 12 gives 36. Exam tip: Substitute both values of t separately in a linear expression, then find their difference.
Frequently asked questions
What is the correct answer to this question?
36
Why is this the correct answer?
Here, P(0)=90-3(0)=90 and P(12)=90-3(12)=54. Therefore, P(0)-P(12)=90-54=36. Option 30 is incorrect because multiplying the decrease rate 3 by 12 gives 36. Exam tip: Substitute both values of t separately in a linear expression, then find their difference.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Linear growth and decay.
Advertisement