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1) Find the length of the parametric curve x=2 cos(t) , y=2 sin(t) on the interval...

1) Find the length of the parametric curve x=2 cos(t) , y=2 sin(t) on the interval [0, pi].

2) A rope lying on the floor is 10 meters long and its mass is 80 kg. How much work is required to raise one end of the rope to a height of 15 meters?

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