A jet flies at 300 mph for two hours before turning 80° and flying at the same speed for another hour

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A jet flies at 300 mph for two hours before turning 80° and flying at the same speed for another hour. Round your final answers to three decimal places, and be sure to use correct units. Include a diagram as part of your answer. a. How far from the initial point is the jet at this time? b. How long (at the same speed) would it take the jet to return to this initial point?

use law of cosines a^2=b^2+c^2-2bccosa, c^2=a^2+B^2-2abcosy, b^2=a^2+C^2-2accos β