The Area of a Circle Depends on the Length of Its

question 29

Essay

The area of a circle depends on the length of its radius.
(a)Write a function a(r)for the area of a circle.
(b)How many square units of sod are needed to cover a circular grass area of radius x?
(c)If the radius of the circular grass area is increased by 2 feet,how much more sod is needed?
(d)How much more sod is needed per foot increase?
(e)If the radius of a circular grass area is increased by h,how much more sod is needed?
(f)How much more sod is needed per unit increase?

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