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aliya0001 [1]
3 years ago
13

Kate has some dimes and quarters. if she has 1919 coins worth a total of $2.95, how many of each type of coin does she have?

Mathematics
1 answer:
Natalija [7]3 years ago
6 0
She has 12 dimes and 7 quarters
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A cylinder is filled with 900 liters of water.find the area of its base if height of cylinder is 20dm.
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V=\pi r^2H\\\\where:\\\\r-a\ radius\\H-a\ height\\\pi r^2-an\ area\ of\ base

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H=20\ dm

substitute:

\pi r^2\cdot20=900\ \ \ |:20\\\\\pi r^2=45\ dm^2

Answer: The area of a base of the cylinder is equal 45 dm².
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