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Subjects
Class 9MathematicsIntroduction to PolynomialsLinear growth and decayEasyLevel 40
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If (H(t)=36+4t), what is (H(10))?

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Answer and explanation

Correct answer: 76

Given H(t)=36+4t, substitute t=10: H(10)=36+4(10)=36+40=76. Therefore, option B is correct. The value 72 would result from incorrectly adding 36 and 36; here, 4t becomes 4×10=40. In exams, substitute the input value first and then simplify carefully.

Related tags

Linear FunctionEvaluating FunctionsSubstitutionLinear GrowthPolynomials

Frequently asked questions

What is the correct answer to this question?

76

Why is this the correct answer?

Given H(t)=36+4t, substitute t=10: H(10)=36+4(10)=36+40=76. Therefore, option B is correct. The value 72 would result from incorrectly adding 36 and 36; here, 4t becomes 4×10=40. In exams, substitute the input value first and then simplify carefully.

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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10 more MCQs
  1. 1If the height of a plant is (h(t)=20+3t) cm, what type of change does it show?
  2. 2If the amount of water is (W(t)=50-4t) litres, what type of change is it?
  3. 3In the linear rule (C(d)=15+2d), what is the initial value?
  4. 4In the linear rule (P(t)=80-5t), what is the rate of change per unit?
  5. 5If (S(t)=10+6t), what will be the value of (S(t)) at (t=4)?
  6. 6If (M(t)=90-7t), what is the value of (M(t)) at (t=5)?
  7. 7Books in a library increase according to (B(n)=100+8n). What does the coefficient of (n) show?
  8. 8If water left in a tank is (L(t)=60-3t) litres, how much water was there at (t=0)?
  9. 9Which rule represents linear growth?
  10. 10Which rule represents linear decay?
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