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Igoryamba
2 years ago
14

A sphere and a right cylinder have the same radius and volume. The cylinder has a height of 8 feet. Find the radius.

Mathematics
1 answer:
siniylev [52]2 years ago
8 0

9514 1404 393

Answer:

  6 feet

Step-by-step explanation:

The volume of a cylinder is given by ...

  V = πr^2·h

For a sphere, the volume is ...

  V = 4/3πr^3

You want the volumes to be the same when h=8, so we have ...

  πr^2·8 = 4/3πr^3

Dividing by πr^2, we have ...

  8 = 4/3r

  r = 3/4·8 = 6

The radius is 6 feet.

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The area of a rectangular horse pasture is 268,500 square yards. The length of the pasture is 5 yards less than three times the
Setler79 [48]

Answer:  width = 300

<u>Step-by-step explanation:</u>

Area (A) = Length (L) x width (w)

Given: A = 268,500

           L = 3w - 5

           w = w

268,500 = (3w - 5) x (w)

268,500 = 3w² - 5w

            0 = 3w² - 5w - 268,500

            0 = (3w + 895) (w - 300)

   0 = 3w + 895        0 = w - 300

  -985/3 = w             300 = w

Since width cannot be negative, disregard w = -985/3

So the only valid answer is: w = 300

   

8 0
3 years ago
4(2x-1)=36<br> How do I answer this
topjm [15]
X = 5; 2(5) - 1 = 9. 4(9) = 36
7 0
2 years ago
Read 2 more answers
Kaylin bought a soda and two bags of popcorn for $3.00 . HER brother bought three sodas and a bag of popcorn for $6.50
Veseljchak [2.6K]

Answer: price of soda (a) = $2 and price of popcorn (b) = $0.5

Step-by-step explanation:

Let's denote soda = a and popcorn = b

Kaylin bought a soda and two popcorn, writing out an equation for this would be

a + 2b = $3...........equation (i)

And her brother bought 3 sodas and 1 popcorn.

3a + b = $6.50..........equation (ii)

From equation (i),

a + 2b = 3

Making a the subject of formula,

a = 3 - 2b......equation (iii)

Using substitution reaction, put equation (iii) into equation (ii)

3(3 - 2b) + b = $6.50

9 - 6b + b = 6.50

9 - 5b = 6.50

Collecting like terms,

5b = 9 - 6.50

Divide both sides by 5,

b = 5.

Put b = 5 into equation (i)

a + 2(0.5) = 3

a + 1 = 3

a = 2

Therefore, the price of soda is $2 per one and $0.5 for each popcorn.

4 0
3 years ago
Please help ggdskdsrjcxseyhcdijb​
anzhelika [568]

Answer:

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Step-by-step explanation:

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3 0
2 years ago
Find the value of n and WX if Wis between
irina [24]

Answer:

Step-by-step explanation:

If W is between X and Y, this means that W is the midpoint of X and Y. The expression XW+WY = XY is therefore true.

Given WX = 6n - 10, XY = 17, and WY = 3n, substituting the given functions into the formula;

6n-10+3n = 17

9n-10 = 17

add 10 to both sides

9n-10+10 = 17+10

9n = 27

divide both sides by 9

9n/9 = 27/9

n = 3

Since WX = 6n-10

substitute n = 3 into the function

WX = 6(3)-10

WX = 18-10

WX = 8

<em>Hence n = 3 and WX = 8</em>

7 0
2 years ago
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