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OpenStudy (anonymous):
A helium-filled balloon is attached to a long string and is at a height of 78 m from the ground. The string is tied to a hook on the ground and makes an angle of 30° with the ground, as shown below. What is the length of the string, in meters?
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OpenStudy (anonymous):
i know its to use tan but how
OpenStudy (anonymous):
|dw:1325620712328:dw|
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