exam Maths Puzzle Numerical Ability

5 coins to = 55cents or 10 coins to = 60 cents

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exam Other Question

A computer bulletin board service charges a flat fee of $10 per month or $4 per month plus $.10 for each minute the service is used. For how many minutes must a person use this service for the cost to exceed $10? A furniture company has established the price-demand function p(x)=65-2.3x and the cost function C(x)=250+15x, where x is in hundreds of chairs, and C is in thousands of dollars.