The frequency of a vibrating string varies inversely as it's length. A string 3 feet long vibrates 175 cycles per second. Find the frequency of a 5 foot string.

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“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .