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SVETLANKA909090 [29]
2 years ago
10

10 identical spheres of radius 7cm are to be painted. What is the total area of surface to be painted​

Mathematics
1 answer:
IgorLugansk [536]2 years ago
6 0

Answer:

Surface area =  4 π r2 square units

Step-by-step explanation:

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What mixed number is 3/8 of 100
shusha [124]
3/8 0f 100
100 / 8 = 12.5
Now, let's multiply this by 3 to be able to get the value
=> 12.5 * 3 = 37.5 is the value of 3/8 of 100.
This is a mixed number because its a combination of whole and decimal numbers.
4 0
3 years ago
Line l is the perpendicular bisector of AB. What is the perimeter of ABC
saveliy_v [14]

Answer:

Perimeter = 60

Step-by-step explanation:

because l bisects AB:

3y+1 = 5y-5

reduce:

2y = 6

y = 3

and:

2x+4 = 4x-12

reduce:

2x = 16

x = 8

AB = (3y+1) + (5y-5)

AB = 8y-4

substitute for y

AB = 8(3)-4

AB = 20

Perimeter = (2x+4) + (4x-12) + 20

reduce:

perimeter = 6x+12

substitute for x:

Perimeter =6(8)+12

reduce:

Perimeter = 60

3 0
2 years ago
What is the y1 of 3x-5y=20
Aliun [14]
Unsure of what you mean by "y1."

If you wish to solve this eqn for y, do this:
-5y = - 3x + 20, 
        -3x + 20
y = ----------------   = (3/5)x - 4  (answer)
           -5
5 0
3 years ago
If the cost of 819.73 for full cover insurance for a female and a male is 1192.64 what is the percentage?
irinina [24]

Answer:

68.7%

Step-by-step explanation:

If the cost of 819.73 for full cover insurance for a female and a male is 1192.64 what is the percentage?

The Percentage is calculated as:

819.73/1192.64 × 100

= 0.68732392004293 × 100

= 68.732392004 %

Approximately = 68.7%

Therefore, the percentage is 68.7%

7 0
3 years ago
Chloe answered 42 of the 50 questions correctly. Express this amount as a percent and a decimal
Oxana [17]
It would be 21 as a percent and 0.21 as a decimal
4 0
3 years ago
Read 2 more answers
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