book Maths Puzzle Numerical Ability

And aircraft carrier follows a course that has a latitude of 288 miles north and a departure of 240 miles east in two days. Find its bearing.

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What is the change in velocity of a car that is traveling at 100km/h north, but is traveling 80km/h south one minute later? What is its average acceleration please help me solve this equation 5x^2 + 33x -14 = 0 i know the answer is 0.4 but dont know how to show this or to work it out the proper way