<PRE><B>Question 1148755</B>
Area of the square rock garden is 80 * 80 = 6400 square feet
:
2 * 3.14 * r = 590 
:
r = 590 /(2 * 3.14) = 93.949
:
Area of circular grass yard = 3.14 * (93.949)^2 = 27714.9418 square feet
:
a)  27714.9418 - 6400 = 21314.9418 is approximately 21314.94 square feet covered by grass
:
b) there are 9 square feet in a square yard
:
21314.9418/9 = 2368.3269 is approximately 2368.33 square yards covered by grass
:
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