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2 years ago

The volume of a sphere is 80pi cm3. What its is surface area to the nearest whole number

1 answer:

3 0

Volume = (4/3) * PI * radius^3
80 * PI = (4/3) * PI * radius^3
The 'PI's' cancel out leaving
80 = (4/3) * radius^3
radius^3 = 80/(4/3)
radius^3 = 60

radius = cube root (60)

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Greg can type 60 words in 50

Butoxors [25]

Answer:

215

Step-by-step explanation:

60=50

258=?

258 divided by 60 = 4.3

50 x 4.3 = 215

7 0

3 years ago

The perimeter of a triangle is 56. The side lengths are x + 4, 3x + 7, and x + 9. What is the value of x?

Sidana [21]

<h3><u>Answer:</u></h3>

x = 7.2

<h3><u>Step-by-step explanation:</u></h3>

Perimeter: Side 1 + Side 2 + Side 3

=> x + 4 + 3x + 7 + x + 9 = 56

=> 5x + 20 = 56

=> 5x = 56 - 20

=> 5x = 36

=> x = 7.2

<h3><u>Conclusion:</u></h3>

Therefore, the value of x is 7.2.

Hoped this helped.

$BrainiacUser1357$

5 0

2 years ago

3/9 in simplest form

Molodets [167]

It is 1/3
3:3 =1
9:3 = 3
make sure that the top and bottom numbers divide with the same number :)

4 0

3 years ago

Identify whether the following equation has a unique solution, no solution, or infinitely many solutions.

fredd [130]

Answer:

no solution

Step-by-step explanation:

4( − 11) = 15 − 4

-44 = 11

Since this iS FALSE, it means that the equation given has no solution

7 0

3 years ago

In twenty years, Kayleen will be four times older than she is today. What is her current age?

eduard

Well there is to equations here that must be equal. X+20=4X Four times old means 4X+X=5X.

If you work to simply the problem you get something that looks like this:
X+20=5X
20=4X
x=20/4 or 5 y/o!

8 0

3 years ago