book Maths Puzzle Numerical Ability

A firm has budgeted a $1500 for display space at a toy show. Two types of display booths are available: "preferred space" costs $18 per square foot unit, with a minimum rental of

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book Other Question

If a map has a scale of 11/2 inches to the mile and if a distance between two points on the map is 9 inches apart, how much is that distance in actual miles?

The book says 6 miles. why? 11/2 * 9?? Driving down a mountain, Tom finds that he has descended 1800 ft in elevation by the time he is 3.25 mi. horizontally away from the top of the mountain. Find the slope of his descent to the nearest hundredth.