Amy leaves the mall and drives directly west at a speed of 55 mph. At the same time, Carlos leaves the mall and drives 35 degrees north of east at a speed of 50 mph. Approximately how far apart are they after 15 minutes?

                                                  /
                                                /         CArlos
    amy                                    /
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55 mph x 15/60 = 13.75 Miles

50 mphx 15/60 = 12.5 miles


The areas of the triangle :

1/2 x 12.5 x 13.75 x sin 125


= 70.39