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Differentiation

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Question 526

The concentration CCC, in mg L−1\text{mg L}^{-1}mg L−1, of a certain chemical in a reaction is modeled by the equation C=12.5e−0.8tC = 12.5 e^{-0.8t}C=12.5e−0.8t, where ttt is the time in hours after the start of the reaction. Determine the rate of change of the concentration, in mg L−1h−1\text{mg L}^{-1}\text{h}^{-1}mg L−1h−1, at the instant when the concentration is exactly 2.4 mg L−12.4 \text{ mg L}^{-1}2.4 mg L−1.

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Markscheme

Differentiation Questions

  1. A Level
  2. /Maths
  3. /Differentiation

717 exam-style questions on Edexcel A Level Maths Differentiation, covering 9.1 Differentiating sin x and cos x, 9.2 Differentiating exponentials and logarithms, 9.3 The Chain Rule, 9.4 The Product Rule, 9.5 The Quotient Rule, 9.6 Differentiating Trigonometric Functions, 9.7 Parametric Differentiation, 9.8 Implicit Differentiation, 9.9 Using Second Derivatives, and 9.10 Rates of Change. Each one has a worked solution and a mark scheme showing where the marks go.

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