A plant's height is (H(t)=18+4t) cm. What will be the height at (t=5)?
Answer and explanation
Correct answer: 38 cm
Given \(H(t)=18+4t\). Substituting \(t=5\), \(H(5)=18+4(5)=18+20=38\) cm. Hence, 38 cm is correct. Getting 32 cm would mean calculating the growth term \(4t\) incorrectly. Exam tip: To find a function value, substitute the given value for the variable and then simplify.
Frequently asked questions
What is the correct answer to this question?
38 cm
Why is this the correct answer?
Given \(H(t)=18+4t\). Substituting \(t=5\), \(H(5)=18+4(5)=18+20=38\) cm. Hence, 38 cm is correct. Getting 32 cm would mean calculating the growth term \(4t\) incorrectly. Exam tip: To find a function value, substitute the given value for the variable and then simplify.
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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