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iren [92.7K]
2 years ago
10

Helpppp plsssss!!!!!!!!!!!

Mathematics
2 answers:
Igoryamba2 years ago
8 0

Answer:

When I did the calculations I got 28,27. But that's not an option so I would say just pick the first one

sladkih [1.3K]2 years ago
3 0

Answer:

A = 28.26

Step-by-step explanation:

Area of a circle: A = π*r^2

π = 3.14

A = 3.14 * 3^2

A = 3.14 * 9

A = 28.26

Hope this helps!

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The two spheres above have the same center. One has a radius of 4 cm, and the other has a radius of 5 cm. Approximately how much
Zanzabum
The space between the two spheres will be the volume of the larger sphere minus the volume of the smaller sphere.  Given that the volume of any sphere is:

V=(4πr^3)/3  The space between to sphere of different radius and positioned about the same center is:

S=(4πR^3)/3-(4πr^3)/3  I used S=volume of space, R=larger radius and r=smaller radius...

S=(4π/3)(R^3-r^3), we are told that R=5 and r=4 so

S=(4π/3)(5^3-4^3)

S=(4π/3)(125-64)

S=(4π/3)(61)

S=244π/61

S=4π cm^3

S≈12.57 cm^3  (to nearest hundredth of a ml)
5 0
4 years ago
The diagonals of rectangle ABCD intersect at point E. If AE = 2x + 5, and BD = 5x + 2, what is AC?
Mkey [24]

<u>C. 42 units</u>

Step-by-step explanation:

I have attached a diagram to help you understand this problem. By looking at the diagram you can see that AE is half of BD, and that BD will be equal to AC. So we need to figure out the length of line BD to get AC.

To do this, you will multiply the length of AE by 2 and set it equal to BD.

2(2x+5)=5x+2

Then distribute, multiply what is in the parentheses by 2.

4x+10=5x+2\\\\

Subtract 4x from both sides.

10=1x+2

Subtract 2 from both sides.

8=1x

x = 8

Now that we have x, we can plug it into the equation to find BD.

5 * 8 + 2=42

BD is equal to 42 units, so we know...

<u><em>AC = 42 units</em></u>

4 0
3 years ago
Tania has 6 tiles with pictures of plants and 3 tiles with pictures of animals. Tania keeps all the tiles on a mat with the pict
Natalka [10]
Initially there were 6 tiles with pictures of plants and 3 tiles with pictures of animals.
She removes one tile with the picture of a plant, so now there are 5 tiles with pictures of plants and 3 tiles with pictures of animals. There are 5+3=8 tiles in total.

The probability that the second tile has a plant on it is the number of tiles with pictures of plants (5) divided by the total number of tiles (8).

The probability is \frac{5}{8}.
5 0
3 years ago
A regular hexagonal flower pot has sides that measure x−6x-6 units. Its perimeter is 78 units. What is the value of x?
Artist 52 [7]
Assuming this is the same test I just took, the answer would be 19.

7 0
3 years ago
-2(-9x+6y) what is the next step
pav-90 [236]

Answer:

Simplifying

Result: 18x - 12y

Step-by-step explanation:

I believe you simplify the expression, by using -2, the number outside the bracket, to multiply with the numbers within the bracket.

-2 x -9x = 18x

-2 x 6y = -12y

5 0
3 years ago
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