A weight is attached to a spring suspended vertically from a ceiling. When a driving force is applied to the system, the weight moves vertically from its equilibrium position, and this motion is modeled by
?
?
where y is the distance from equilibrium (in feet) and t is the time (in seconds).
?
Use the identity
where 
, to write the model in the form 
.
?
A. 
B. 
?
C.
D.
E.
Answer: E
Mathematics
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?
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