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Volgvan
3 years ago
5

Find the area of the circle.

Mathematics
1 answer:
melomori [17]3 years ago
8 0
Area of circle=pi x radius ^2,  if the line through the center of the circle goes from one end to the other, it is the diameter, so you need to divide it by 2 before you put it into the formula. If the line is only half way, then it is already the radius, so use that number in the formula.

2.  the line is half way only, so it is the radius=21. You can use it in the formula:
  a=3.14 x 21 ^2
  a=3.14x441
 a =1384.74

3. the line goes all the way to the other side of the circle, so it is the diameter=56. you need to divide it by 2 to get the radius: so 56/2=28=radius. Now us 28 in the formula:
3.14 x 28^2
a=3.14 x 784
a=2461.76.

just continue doing that for the rest of the problems. Hope this helps.
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Which statement is true about the product square root of 2(3square root of 2 + square root of 14)?
sukhopar [10]

Answer:

\sqrt{2} (3\sqrt{2} +\sqrt{14})=6+2\sqrt{7}

Step-by-step explanation:

Given : \sqrt{2} (3\sqrt{2} +\sqrt{14})

Solution:

\sqrt{2} (3\sqrt{2} +\sqrt{14})

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6+2\sqrt{7}

Thus ,  \sqrt{2} (3\sqrt{2} +\sqrt{14})=6+2\sqrt{7}

Thus the solution is irrational since square root 7 does not have a perfect square and equal to 6+2square root of 14

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How many solutions are there to the equation below? 12x + 32 = 12x - 7
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∴ you have 0 solutions

hope this helps


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