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r2 + r - 20 = 0
(r + 5)(r - 4) = 0
r + 5 = 0 or r - 4 = 0
r = -5 or r = 4

Q: R² plus r-20 equals 0?

This answer is:

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r2 + r - 20 = 0
(r + 5)(r - 4) = 0
r + 5 = 0 or r - 4 = 0
r = -5 or r = 4

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R/4 = 1/3

r/4*4 = 1/3 *4

r=4/3

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(4 - r) is.

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Surface area of sphere is 4 x pi x r x r

Volume of sphere is (4/3) x pi x r x r x r

Hence ((4/3) x pi x r x r x r) / (4 x pi x r x r) = 1/2

((4/3) x r) / (4) = 1/2

(1/3) x r = 1/2

r = 1 and 1/2

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This is a Ditloid.

The answer is 4 Right Angles in a Rectangle.

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