4MA0 Higher January 2016 Paper 4R Q10

EdexcelHigherOld spec5 marksStandard Form

10 The table gives the surface areas, in square kilometres, of five seas.

Sea	Surface area in square kilometres
Mediterranean Sea	\(2.97 \times 10^6\)
East China Sea	\(1.25 \times 10^6\)
Baltic Sea	\(4.22 \times 10^5\)
Red Sea	\(4.38 \times 10^5\)
Okhotsk Sea	\(1.59 \times 10^6\)

(a) Write \(1.59 \times 10^6\) as an ordinary number. (1)

(b) Work out the difference, in square kilometres, between the largest surface area and the smallest surface area for these five seas.
Give your answer in standard form. (2)

The surface area of the East China Sea is \(k\) times the surface area of the Baltic Sea.

Scheme	Marks
1 590 000	B1
	(1)

Mark scheme (b)

Scheme	Marks
\(2.97 \times 10^6 - 4.22 \times 10^5\) oe or \(4.22 \times 10^5 - 2.97 \times 10^6\) oe or \(\pm\) 2548000	M1
\(\pm 2.548 \times 10^6\)	A1
	(2)

Notes

A1: allow \(\pm 2.5 \times 10^6\) or \(\pm 2.55 \times 10^6\) if working shown.