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Vedmedyk [2.9K]

2 years ago

14

I need help on this question

1 answer:

Morgarella [4.7K]2 years ago

5 0

Answer:

the first one

Step-by-step explanation:

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Can someone help me pls

Wittaler [7]

Answer:

3 cm

Step-by-step explanation:

$V_{cylinder} = 189\pi \: cm^3$ (Given)

$h_{cylinder} = 21\: cm$ (Given)

Formula for $V_{cylinder}$ is given as:

$V_{cylinder} = \pi r^2h$

$\implies 189\pi = \pi r^2(21)$

$\implies \frac{ 189\pi}{21\pi} = r^2$

$\implies 9 = r^2$

$\implies \pm\sqrt 9 = r$

$\implies \pm 3 = r$

Length of radius can not negative

$\implies r = 3 \: cm$

Hope it helps you in your learning process.

8 0

1 year ago

Read 2 more answers

375000000 divided by 1570000000

Zielflug [23.3K]

Answer: 0.238853503185

(I obviously used a calculator.)

If you rounded this answer, it would be 0.24. Hope this helps!

8 0

3 years ago

Read 2 more answers

Is (2, 4) a solution to the system<br> y = 2x<br> x + y = 6

posledela

Answer:

yes you plug the numbers in

5 0

2 years ago

WILL GIVE BRAINLIEST!

olga_2 [115]

Answer:

This is complicated

Step-by-step explanation:

UHM

5 0

2 years ago

Simplify: 4 square root of 2 plus square root of 18 minus square root of 9

Ket [755]

I hope this helps you

5 0

2 years ago