exam Maths Puzzle Numerical Ability

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100.
Sail Boat Speed. The sail area-displacement ratio S provides a measure of the sail power available to drive a boat. For a boat wit

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(x^0y^2)^-2y^5x / x^2x^-5yy^-3 One car model costs $12,000 and costs an average of $.10 per mile to maintain. Another car costs $14,000 and costs an average of $.08 per mile to maintain. If one of each model i