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What is Distance
Distance is the space between P and Q.
What is Arc Length?
Arc length is the length of the actual curve.
Distance Formula
D=√[(x2-x1)2+(y2-y1)2]
Arc Length Formula
L=∫ab √[1+(dy/dx)2]dx
Determine Arc Length for f(x)=√(25-x²) on a=-5 to b=5
Answer: 5π