book Maths Puzzle Numerical Ability

Please help me to solve this answer I'm so stuck.

A company specializing in magazine sales over the telephone found that in 2500 phone calls, 360 resulted in sales and were mad

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book Other Question

3/4 -b please please help me with this problem.ive tried and tried and i still cant get the answer. If the latitude of Chicago is about 42degrees and the radius of the earth is about 4000 miles, how far is Chicago from the equator?(use pi=3.1416)