The Taylor family wants to fill up the swimming pool to the very top of water the length of the pool is 50 m and the width is 25
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The equation of a circle with a center of (h,k) with a radius of "r" is
looking at the given equation,
5x^2 +5y^2=20
divide 5 to both sides to get
x^2+y^2 =4
now compare that to the equatio of a circle shown above
looking at the given equation,
5x^2 +5y^2=20
divide 5 to both sides to get
x^2+y^2 =4
now compare that to the equatio of a circle shown above
notice, the "common ratio" is -3, thus their sum is just
1 + (-3) + 9 + (-27) + 81.