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An Object Weighing WW Pounds Is Suspended from the Ceiling by a Steel Spring

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An object weighing WW pounds is suspended from the ceiling by a steel spring (see figure) . The weight is pulled downward (positive direction) from its equilibrium position and released. The resulting motion of the weight is described by the function y=12et4cost,t>0y = \frac { 1 } { 2 } e ^ { \frac { - t } { 4 } } \cos t , t > 0 where yy is the distance (in feet) and tt is the time (in seconds) . Use a graphing utility to select the graph of the function.
 An object weighing  W  pounds is suspended from the ceiling by a steel spring (see figure) . The weight is pulled downward (positive direction)  from its equilibrium position and released. The resulting motion of the weight is described by the function  y = \frac { 1 } { 2 } e ^ { \frac { - t } { 4 } } \cos t , t > 0  where  y  is the distance (in feet)  and  t  is the time (in seconds) . Use a graphing utility to select the graph of the function.   A)    B)    C)    D)    E)


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