3 years ago

Eathan correctly answers 80% of the total questons

Mathematics

1 answer:

KATRIN_1 [288]3 years ago

3 0

Answer:

he got 20% wrong

he got a B

Step-by-step explanation:

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The angle is 1/5 of the circle. what is the measure of the angle?

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2(y+4)−8=24<br> what is y?

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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.

Lisa [10]

The formula of the volume of a cylinder:

$V=\pi r^2H\\\\where:\\\\r-a\ radius\\H-a\ height\\\pi r^2-an\ area\ of\ base$

We have:

$V=900\ liters\\1L=1dm^3\ therefore\ V=900L=900dm^3$

and

$H=20\ dm$

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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3 years ago