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Draw a diagram for the given information :

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First find the measures of angles $\"\"$ , $\"\"$ , $\"\"$ , and $\"\"$ .

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In $\"\"$ , use the law of sines to find the length of $\"\"$ .

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Use the right triangle $\"\"$ and the cosine function to find the length of $\"\"$ .

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Therefore, 690 feet high is the balloon to the nearest foot.

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690 feet high is the balloon to the nearest foot.