The area of a circle is represented by the equation:
![A=\pi r^{2}](https://tex.z-dn.net/?f=%20A%3D%5Cpi%20r%5E%7B2%7D%20%20)
We know that the diameter is two times the radius: ![d=2r](https://tex.z-dn.net/?f=%20d%3D2r%20)
So if we know that the diameter of the circle is 24m, we can divide this by two in order to get the radius:
-->![r=12m](https://tex.z-dn.net/?f=%20r%3D12m%20)
So then we can plug this radius in to the equation for the area of a circle:
![A=\pi (12)^{2}](https://tex.z-dn.net/?f=%20A%3D%5Cpi%20%2812%29%5E%7B2%7D%20%20)
![A=144\pi](https://tex.z-dn.net/?f=%20A%3D144%5Cpi%20%20)
We are told to use 3.14 as pi, and not pi itself, so let's plug in 3.14 for pi:
![A=3.14(144)](https://tex.z-dn.net/?f=%20A%3D3.14%28144%29%20)
![A=452.16m^{2}](https://tex.z-dn.net/?f=%20A%3D452.16m%5E%7B2%7D%20%20)
Now we know that the area of this circle is 452.16 square meters.
That will be easy. It could be 12/56+3/56 or, 7/56+8/56 or, 10/56+5/56.
Answer:
Butterflies
Step-by-step explanation:
Thanks
Answer:
![x=4\\\\x=-7](https://tex.z-dn.net/?f=x%3D4%5C%5C%5C%5Cx%3D-7)
Step-by-step explanation:
First, we need to set up the equation
![x^2+3x-28=0](https://tex.z-dn.net/?f=x%5E2%2B3x-28%3D0)
To solve this, we have two options: factoring or using the quadratic formula. In this case, factoring will work, so we can use that
To factor, we need to find two numbers that add together to give you 3 and multiply to give you -28
In this case, these two numbers would nee to be -4 and 7
This means that our factored equation would be:
![(x-4)(x+7)=0](https://tex.z-dn.net/?f=%28x-4%29%28x%2B7%29%3D0)
Now all we need to do is input the values of x that will give you 0. This means that the two solutions are
![x=4\\\\x=-7](https://tex.z-dn.net/?f=x%3D4%5C%5C%5C%5Cx%3D-7)
Answer:
2 days
Step-by-step explanation:
because if he buys two each day then he will have four cards on the second day