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AURORKA [14]
3 years ago
13

Find the surface area of a sphere with a radius of 8cm

Mathematics
1 answer:
Andreas93 [3]3 years ago
3 0
I believe the proper way to find the surface area of a sphere is 4 times 3.14 (which is Pi) times the radius squared. Or 4(3.14)*r^2.

Where I found 804.25
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A bag contains 2 red marbles, 7 blue marbles and 5 green marbles. If two marbles are drawn out of the bag, what is the exact pro
vivado [14]

Answer:

0.25 or 25%.

Step-by-step explanation:

2 Red + 3 Blue + 7 Green = 12 Total Marbles.

You have 3 blue marbles out of the total marbles, so 3/12, then simplify it. 3/12 = 1/4. This gives you 0.25, or 25%.  

The probability of drawing a blue marble is 0.25 or 25%

4 0
3 years ago
3x+2y=10<br> 12x+5y=25<br><br> Solve by substitution or elimination
zaharov [31]
3x + 2y = 10 ....multiply by -4
12x + 5y = 25
-------------------
-12x - 8y = -40 (result of multiplying by -4)
12x + 5y = 25
------------------add
-3y = - 15
y = -15/-3
y = 5

3x + 2y = 10
3x + 2(5) = 10
3x + 10 = 10
3x = 10 - 10
3x = 0
x = 0

solution is (0,5)
5 0
3 years ago
Brad swims 4 laps every 6min how long does it take him to swim 14 laps?
Nadya [2.5K]
I don’t know the answer
5 0
3 years ago
Kyleigh put a large rectangular sticker on her notebook. The height of the sticker measures 12 centimeters. The base is half as
saul85 [17]
Height = 12 cm
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Area = length x width
Area —> 12x6 = 72

The sticker covers 72 cm of the notebook.
8 0
3 years ago
Write an algebraic expression for the given quantity. Let X represent the unknown value one fourth of the sum of a number and ei
Leviafan [203]
I think that (1/4)x+8 would be your algebraic expression.  
4 0
3 years ago
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