1)A winch of radius 2 ft is used to lift heavy loads. If the winch makes 4 revolutions every 15 s, find the speed at which the load is rising. 2)The wheels of a car have radius 11 in. and are rotating at 750 rpm. Find the speed of the car in mi/h.   3)To measure the speed of a current, scientists place a paddle wheel in the stream and observe the rate at which it rotates. If the paddle wheel has radius 0.40 m and rotates at 100 rpm, find the speed of the current in m/s.

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Sequence and Series

A sequence is defined as a collection of things. Series is defined to sum the things one by one in the sequence.  It was invented by German mathematician Carl Friedrich Gauss.