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The 50-lb package starts from rest, slides down the smooth ramp, and is stopped by the spring. The coefficient of static friction between the package and the ramp is μs=0.12. If the constant of the spring is 700 lb/ft, how far from the point of contact with the spring is the package brought to rest?
What is a 90 percent confidence interval for the standard deviation of the thickness of a washer produced by this procedure?
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