3 years ago

Help meh with my math ... the question is in the picture and the answer choices are

Mathematics

1 answer:

Sphinxa [80]3 years ago

5 0

the answer would be -b

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A cylinder with a radius of 1 cm and a height of 21 cm has the same volume as a cone with a height of 7 cm. What is the radius o

Natasha_Volkova [10]

Answer:

Step-by-step explanation:

The formula of a volume of a cylinder:

$V=\pi r^2H$

r - radius

H - height

We have r = 1cm and H = 21cm. Substitute:

$V=\pi(1^2)(21)=21\pi\ cm^3$

The formula of a cone:

$V=\dfrac{1}{3}\pi r^2H$

r - radius

H - height

We have V = 21π cm³ and H = 7cm. Substitute:

$\dfrac{1}{3}\pi(r^2)(7)=21\pi$ divide both sides by π

$\dfrac{1}{3}(7)(r^2)=21$ divide both sides by 7

$\dfrac{1}{3}r^2=3$ multiply both sides by 3

$r^2=9\to r=\sqrt9\\\\r=3\ cm$

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2 years ago

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disa [49]

2 -(-4) = 2 + 4 = 6

-5-(10) = -5 - 10 = -15

I hope it helps you

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3 years ago

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4. Order the set of numbers from least to greatest: 164.8. 814 7 (5 points) 2 o 15 V64 88.14 V64.8 81 2 3. 814 64 o V64 . 3. 814

kirza4 [7]

Answer:

For the answer to the question above,

the Order the set of numbers from least to greatest: square root 64, 8 and 1 over 7, 8.14 repeating 14, 15 over 2

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Step-by-step explanation:

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3 years ago

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Andreyy89

Answer:

Step-by-step explanation:

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3 years ago

5 (RootIndex 3 StartRoot x EndRoot) + 9 (RootIndex 3 StartRoot x EndRoot)

Ratling [72]

Answer:

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Step-by-step explanation:

To obtain the sum ; the a clear explanation has been attached in the picture below ;

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2 years ago