Foundation November 2020 Paper 1 Q17

OCRFoundationCurrent spec7 marksStandard Form

17 The table below shows the number of barrels of oil produced per day by some countries.

Country	Barrels of oil produced per day
USA	\(1.17 \times 10^{7}\)
China	\(3.98 \times 10^{6}\)
UK	\(9.39 \times 10^{5}\)
Cameroon	\(9.32 \times 10^{4}\)
Japan	\(3.92 \times 10^{3}\)

(a) Write the number of barrels of oil produced per day by Cameroon as an ordinary number. [1]

(b) How many more barrels of oil per day did China produce than the UK?
Give your answer in standard form, correct to 3 significant figures. [4]

Is he correct?
Show how you decide.

Jamal is .................. because .................. [2]

Answer	Marks	Part marks and guidance
93 200	1

Mark scheme (b)

Answer	Marks	Part marks and guidance
\(3.04 \times 10^{6}\)	4	B3 for 3 040 000 or \(3.041[0..] \times 10^6\) or \(30.4 \times 10^5\) oe rounded to 3sf OR B2 for 3 041 000 or \(30.41[0..] \times 10^5\) oe index form OR M1 for \((3.98 \times 10^6) - (9.39 \times 10^5)\) or 3 980 000 – 939 000 and M1 for their final value correctly rounded to 3sf	M1 may be implied by figs 3041…. The unrounded value must be seen

Mark scheme (c)

Answer	Marks	Part marks and guidance
Wrong/Incorrect it is 3 000 or 2 984 to 2 985 times bigger or No, difference is [order of] \(3 \times 10^3\) which is 3 000 or Incorrect 11 760 is 3 times bigger than 3 920 or 3 900 000 is 3 times smaller than 11 700 000 or Incorrect and evaluates USA’s production ÷ 3 or Japan’s production × 3 with comment comparing the values	2	M1 for difference is [order of] \(10^3\) or \(\dfrac{1.17 \times 10^7}{3.92 \times 10^3}\) or \((1.17 \times 10^7) \div 3 = 3.9 \times 10^6\) or 11 700 000 ÷ 3 = 3 900 000 or \((3.92 \times 10^3) \times 3 = 1.176 \times 10^4\) or \(1.18 \times 10^4\) or 3 920 × 3 = 11 760	Wrong/Incorrect and a comment for 2 marks to answer the question Condone No Values must be in the same form for comparison.