SubjectCover

Pearson Edexcel International GCSE (9–1) · MATHEMATICS A · Unit

Unit 7

107 practice questions

Start practising (41 questions)

Topics covered

Practice questions

41–41 of 41 · Easy

  1. Question 41

    5 marks · Easy

    The temperature, °C, in a greenhouse at time hours is modelled by the cubic function .

    (a)

    Find the temperature at hours.

    [1 mark]
    (b)

    State the value of (hours) when the graph of cuts the vertical (temperature) axis.

    [1 mark]
    (c)

    The temperature reaches a minimum at some value of . Write down a quadratic equation that must be solved to find the value of where the minimum occurs.

    [1 mark]
    (d)

    Solve the equation using the quadratic formula. Give both values for , correct to 2 decimal places.

    [2 marks]
    Answer and see the solution →