exam Maths Puzzle Numerical Ability

solve the problem. Suppose a cost-benefit model is given by:
2845
y = ------
100-x

where y is the cost for removing x percent of a given polutant. what percent

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exam Other Question

If a bus leaves a station at 1 P.M., traveling west at an average rate of 44 mi/h. An hour later a second bus leaves the same station, traveling
east at a rate of 48 mi/h. What time will the two buses be at 274 mi apart? Can you please help me with this word problem? At the football game 5/12 of the fans were rooting for the Cowboys. The rest were rooting for the Packers. What was the ratio of Cowboys fans to Packers fans?