Answer:
The diameter would be 4.456338407...
Step-by-step explanation:
This is because if the formula for circumference is C= D(pi) , to find the diameter it's the opposite. D= C/pi
17) ![x-8=11](https://tex.z-dn.net/?f=x-8%3D11)
18) ![9-x=5](https://tex.z-dn.net/?f=9-x%3D5)
19) ![x+6=7](https://tex.z-dn.net/?f=x%2B6%3D7)
20) ![x+(-4)=-18](https://tex.z-dn.net/?f=x%2B%28-4%29%3D-18)
Step-by-step explanation:
17) The difference between a number and 8 is 11
Let number = x
then the equation will be:
![x-8=11](https://tex.z-dn.net/?f=x-8%3D11)
Solving:
![x-8=11](https://tex.z-dn.net/?f=x-8%3D11)
![x=11+8\\x=19](https://tex.z-dn.net/?f=x%3D11%2B8%5C%5Cx%3D19)
18) Nine less than a number is five.
Let number = x
then the equation will be:
![9-x=5](https://tex.z-dn.net/?f=9-x%3D5)
Solving:
![9-x=5\\-x=5-9\\-x=-4\\x=4](https://tex.z-dn.net/?f=9-x%3D5%5C%5C-x%3D5-9%5C%5C-x%3D-4%5C%5Cx%3D4)
19) Seven is equal to a number plus 6
Let number = x
then the equation will be:
![x+6=7](https://tex.z-dn.net/?f=x%2B6%3D7)
Solving:
![x+6=7\\x=7-6\\x=1](https://tex.z-dn.net/?f=x%2B6%3D7%5C%5Cx%3D7-6%5C%5Cx%3D1)
20) The sum of a number and -4 is -18
Let number = x
then the equation will be:
![x+(-4)=-18](https://tex.z-dn.net/?f=x%2B%28-4%29%3D-18)
solving:
![x+(-4)=-18\\x-4=-18\\x=-18+4\\x=-14](https://tex.z-dn.net/?f=x%2B%28-4%29%3D-18%5C%5Cx-4%3D-18%5C%5Cx%3D-18%2B4%5C%5Cx%3D-14)
Keywords: Algebraic Expressions
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Answer:
30,775.14 mm²
Step-by-step explanation:
area - πr²
3.14 x (99)²
30,775.14 mm²
They were all military officers.
Another name for natural numbers that I've heard is counting numbers since they are the numbers that we count with.