ABSTRACT
R3 when R1 = 3.6 k, R2 = 7.2 k and
R3 = 13.6 k. (3)
18. Evaluate 6 2 7
− 45 9
as a mixed number and as a decimal, correct to 3 decimal places. (3)
19. Evaluate, correct to 3 decimal places:√[ 2e1.7 × 3.673 4.61 × √3π
] (3)
20. If a = 0.270, b = 15.85, c = 0.038, d = 28.7 and e = 0.680, evaluate v correct to 3 significant figures, given that: v =
√( ab c
− d e
) (4)
21. Evaluate the following, each correct to
2 decimal places: (a) (
36.22 × 0.561 27.8 × 12.83
)3
(b) √(
14.692√ 17.42 × 37.98
) (4)
22. If 1.6 km = 1 mile, determine the speed of 45 miles/hour in kilometres per hour. (2)
23. The area A of a circle is given by A = πr2. Find the area of a circle of radius r = 3.73 cm, correct to 2 decimal places. (3)
24. Evaluate B, correct to 3 significant figures, when W = 7.20, v = 10.0 and g = 9.81, given that B = Wv
2g (3)
