exam Maths Puzzle Numerical Ability

two ships leave a harbor traveling on courses that have an angle of 120 degrees between them. if they each travel 515 miles how far apart are they (to the nearest mile)?

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exam Other Question

A coordinate grid is placed over a map of Pineville. The police department is located at (-12,7) and the fire department is located at (-6,6). What are the coordinates of the town hall, which is located halfway between the police and fire deparments? hey could you please help me out with this permutation problem:

P(n,5)=20P(n,3)