Mr. Townes created a 2-foot wide garden path around a circular garden. The radius of the garden is 7 feet. He wants to cover the
path in stones. If Mr. Townes needs 1 bag of stones for every 5 square feet of path, how many bags of stones will he need 5o cover his garden path?
1 answer:
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are the critical points, and judging by the picture alone, you must have
Then the shaded region has area
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Now, for part (iv), you're asked to find the minimum of
setting equal to 0 and finding the critical point:
This is to say the minimum value of
The minimum value of