4MA0 Higher June 2015 Paper 3R Q21

EdexcelHigherOld spec3 marksUpper & Lower Bounds

21 Correct to 2 significant figures, \(a = 58\), \(b = 28\) and \(c = 18\)
Calculate the upper bound for the value of \(\dfrac{a}{b - c}\)
Show your working clearly.

(3)

Scheme	Marks
58.5 or 57.5 or 27.5 or 28.5 or 18.5 or 17.5	B1
\(\dfrac{58.5}{27.5 - 18.5}\)	M1
6.5	A1
	(3)

Notes