What is it referring too? is there a graph to it???
Let's see what to do buddy...
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Reminder:
![(a + b)(a - b) = {a}^{2} - {b}^{2}](https://tex.z-dn.net/?f=%28a%20%2B%20b%29%28a%20-%20b%29%20%3D%20%20%7Ba%7D%5E%7B2%7D%20-%20%20%7Bb%7D%5E%7B2%7D%20%20)
So we need to just Multiply above equations like this :
![x + y = 70](https://tex.z-dn.net/?f=x%20%2B%20y%20%3D%2070)
![x - y = 40](https://tex.z-dn.net/?f=x%20-%20y%20%3D%2040)
![(x + y)(x - y) = 70 \times 40](https://tex.z-dn.net/?f=%28x%20%2B%20y%29%28x%20-%20y%29%20%3D%2070%20%5Ctimes%2040)
![{x}^{2} - {y}^{2} = 2800](https://tex.z-dn.net/?f=%20%7Bx%7D%5E%7B2%7D%20-%20%20%7By%7D%5E%7B2%7D%20%3D%202800%20%20)
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And we're done.
Thanks for watching buddy good luck.
♥️♥️♥️♥️♥️
Hello!
The area of a cylinder formula- Area = Pi * radius squared * height
<span>In this case we are looking for height (altitude) </span>
<span>plug in our known values </span>
<span>500 = area </span>
<span>4 = radius </span>
<span>Pi ~ 3.141592654 </span>
<span>to find height... </span>
<span>500 = 3.141592654 * (4)^2 * height </span>
<span>500 = 3.14 * 16 * height </span>
<span>500 = 50.26 * height </span>
<span>divide both sides by 50.26.. </span>
<span>9.947 = height
</span>
<span>9.95 is the Correct Answer ( letter C)
</span>
Hope this Helps! Have A Wonderful Day! :)
The answer is 80, because 8 is in the hundreds place which means 80.