Question: 1. Find how fast (a) the circumference, (b) the area, of a circle increases when the radius increases. 2. Find how fast (a) the volume,

1. Find how fast (a) the circumference, (b) the area, of a circle increases when the radius

increases.

2. Find how fast (a) the volume, (b) the surface area, of a sphere increases as the radius

increases.

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