2 years ago

Find the total surface area of this cylinder.

Mathematics

1 answer:

Natali5045456 [20]2 years ago

7 0

Answer

967.1 squared cm, multiply area of base by two, and perimeter by 15.

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Find the values of x and y

zhuklara [117]

You can use a tangent:

$tangent=\dfrac{opposite}{adjacent}$

We have opposite = 17 and adjacent = x.

$\tan30^o=\dfrac{\sqrt3}{3}$

substitute:

$\dfrac{17}{x}=\dfrac{\sqrt3}{3}$ cross multiply

$x\sqrt3=(3)(17)$ multiply both sides by √3

$x(\sqrt3)(\sqrt3)=51\sqrt3$

$3x=51\sqrt3$ divide both sides by 3

$x=17\sqrt3$

Use the Pythagorean theorem:

$y^2=(17\sqrt3)^2+17^2\\\\y^2=289(\sqrt3)^2+289\\\\y^2=289\cdot3+289\\\\y^2=867+289\\\\y^2=1156\to y=\sqrt{1156}\\\\y=34$

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Other method.

$30^o-60^o-90^o$ triangle.

The sides are in the ratio $1:2:\sqrt3\to17:y:x$

Therefore

$17:(2\cdot17):(17\sqrt3)\to17:34:17\sqrt3\to x=34,\ y=17\sqrt3$

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3 years ago

How do you answer these two questions?

-BARSIC- [3]

I think you could multiply or divide. Hope this helps:)

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2 years ago

Three fourths divided by one eighths

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3/4÷1/8 is the same as 3/4×8/1.
3×8=24
4×1=4
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Ashley bought 6 yds of ribbon for $5.28. What ratio is proportional to this?

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My best guest would be A.

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The green paint is less full

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