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Todd's friend Olivia is flying her stunt plane at an elevation of 6.3 km. From the ground, Todd sees the plane moving directly toward him from the west at a 49° angle of elevation. Three minutes later he turns and sees the plane moving away from him to the east at a 65° angle of elevation. How fast is Olivia flying in kilometers per hour?

Mathematics
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the answer is 415!
how!??!?! hahah ty !
49 = d1 over 6.3 -> d1 = 6.3 tan 49 ≈ 7.25 km

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Other answers:

tan 65 = d2 over 6.3 -> d2 = 6.3 tan 65 ≈ 13.5 km
Speed = Distance over Time ≈ 7.25 + 13.5 over 0.05 ≈ 415 km/hr

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