exam Maths Puzzle Numerical Ability

Please someone help!
(a) Find sin 26.1 degrees
(b) Find the acute angle, 0(with a dash through it),to the nearest tenth of a degree is cos 0 (with a dash through it) = 0.8084

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Find -x when x=20 1)What is the area of a rectangle that has a perimenter of 47mm and a lenth of 18.5mm?
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