exam Maths Puzzle Numerical Ability

What is the annual rate of increase of the U.S. population? Where did you find the information needed?

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exam Other Question

How can you find an equation of a line satisfying the given conditions: Perpendicular to x=2 and passing through (3,4)? with a tail wind, a helicopter traveled 300mi in an hour and 40 min. the return trip aganst the same wind took 20 min longer. find the wind speed and also the air speed of the helicopter.