exam Maths Puzzle Numerical Ability

Determine the area of triangle ABC given the following information:
A=12, B=13, C=5

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exam Other Question

Jan is flying a plane on a triangular course at 320 mi/hr. she flies due east for two hours and then turns right through a 65o angle. How long after turning will she be exactly southeast of where she started?
Thank You please solve

x+(x*.05)=947