The displacement from equilibrium of an oscillating weight suspended by a spring is given by
?
?
where y is the displacement in centimeters and t is the time in seconds (see figure). Find the displacement when 
. (Round your answers to nearest tenth.)
?
?
A. 1.200 cm
B. 1.100 cm
C. 1.000 cm
D. 0.800 cm
E. 1.300 cm
Answer: D
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A. 
+ 
B. 
C. 
- 
D. 
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