2 years ago

What is the value of the expression below? 13 - (-9)

Mathematics

1 answer:

yuradex [85]2 years ago

7 0

13 - (-9)
13 - 9 = 4

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The volume of the original cylinder is

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... V = 1.089π = π·1.1²·(1-k)

... 1.089/1.21 = 1-k

... k = 1 - 1.089/1.21 = 1 - 0.9 = 0.1 = 10%

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