exam Maths Puzzle Numerical Ability

f(x)=2x^2-3x+5, find f(1)

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Determine the area under the standard normal curve that lies to the left of a)z=0.43 b) z=-o.13 c) z=-0.75 d) z=1.62 A survey of 400 people found that 66 were left-handed. What percent of those surveyed were left-handed