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kkurt [141]
2 years ago
10

Please help if u can! :)))

Mathematics
1 answer:
jasenka [17]2 years ago
6 0
Should be 11.53256.
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Yea yea you know i need help my brains tiny thank you for everything and everyone helping
Darina [25.2K]

Answer: r=6

Step-by-step explanation:

<u>Step 1: Substitute for the known variables</u>

we know that the formula to find the volume of a cylinder is <u>V= πr²h</u>

π= 3.14

h= 12

r= ?

v=1,357

Plugging the numbers we know into the formula, we get:

1,357= 3.14xr²x12

1,357= 3.14x12xr² (because with the commutative property of multiplication you can multiply in any order)

1,357= 37.68 x r²

<u>Step 2: Get the variable term (the letter term) on the left</u>

37.68 x r²= 1,357

Now, divide by 37.68. (I know to divide because when you switch the 37.68x r² the other way around to  r²x37.68, you are clearly multiplying and must do the inverse operation (opposite of multiplication; division) to solve the problem.

So,

r²= 1357÷37.68

r²= 36.0138004 ----> about 36.

r²= 36

This equation isn't over yet because we still have the exponent on the r. Whenever you see a letter squared (to the power 2) in an equation, the "inverse operation" is to take the square root of both sides. Look:

r²= 36

The square root of  r² is just r, because r x r =  r²

The square root of 36 is 6, because 6x6=36.

Now we have :

r= 6

Step 3: Check

Now we have all the variables. To check to make sure the radius is correct, "plug in"

V= π r²h

1,357= 3.14x6²x12

1,357= 3.14x36x12

1,357= 113.04x12

1,357= 1356.48

They said in the question that the volume is APPROXIMATLEY 1357, so I can just round 1356.48 --> 1356.5---> 1357. Now I am sure that the radius is 6.

Hope this helps :)) also brainliest would be appreciated  :D

4 0
2 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=%5Csqrt%7B-63%5C%5C" id="TexFormula1" title="\sqrt{-63\\" alt="\sqrt{-63\\" align="absmiddle"
alex41 [277]
Here you go! Hope this helps

4 0
2 years ago
In a sale, normal prices are reduced by 10%
Free_Kalibri [48]
£54*.1=?
£54-?= ??

I don't know what £ is
6 0
3 years ago
The United Kingdom is one of the leading fishing nations of the world. Which of the following is the best reason why this is tru
Artemon [7]
D the uk is surounded by water :D

7 0
3 years ago
2 2/3 + 3 3/4<br> This Is Fraction
dangina [55]

Answer:

6 5/12

Step-by-step explanation:

2 2/3 as a mixed number is 8/3

3 3/4 as a mixed number is 15/4

To make the 2 fractions have a common denominator, they become:

32/12 and 45/12

to add them up it will be: 77/12 which can be written as 6 5/12

6 0
3 years ago
Read 2 more answers
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