Answer:
326.56 in².
Step-by-step explanation:
<u>Mathematics: Define/explain.</u>
<u>SURFACE AREA:</u> The measure of the total area that an object occupies.
The formula for finding the surface area for a cylinder is:
![SA=2\pi r^2+2\pi rh](https://tex.z-dn.net/?f=SA%3D2%5Cpi%20r%5E2%2B2%5Cpi%20rh)
![r-radius](https://tex.z-dn.net/?f=r-radius)
![h-height](https://tex.z-dn.net/?f=h-height)
<u>Mathematics: Solve.</u>
According to the image, the cylinder has a height of 9 inches and a base radius of 4 inches.
Now, we can plug the numbers into the formula.
![SA=2\pi 4^2+2\pi4*9- (2*3.14*4*4)+(2*3.14*4*9)=326.56.](https://tex.z-dn.net/?f=SA%3D2%5Cpi%204%5E2%2B2%5Cpi4%2A9-%20%282%2A3.14%2A4%2A4%29%2B%282%2A3.14%2A4%2A9%29%3D326.56.)
<u>Mathematics: Conclude.</u>
Therefore, the surface area of this cylinder is 356.56 in².
Answer:
A
Step-by-step explanation: hope this helps!!
You are given the system of equations
![\left\{\begin{array}{l}y=2x-1\\5x-4y=1.\end{array}\right.](https://tex.z-dn.net/?f=%5Cleft%5C%7B%5Cbegin%7Barray%7D%7Bl%7Dy%3D2x-1%5C%5C5x-4y%3D1.%5Cend%7Barray%7D%5Cright.)
If you want simply to know whether (1,1) is a solution of this system, then substitute x=1 and y=1 into both equations:
![\left\{\begin{array}{l}1=2\cdot 1-1\\5\cdot 1-4\cdot 1=1\end{array}\Rightarrow \begin{array}{l}1=1\\1=1\end{array}\right.](https://tex.z-dn.net/?f=%5Cleft%5C%7B%5Cbegin%7Barray%7D%7Bl%7D1%3D2%5Ccdot%201-1%5C%5C5%5Ccdot%201-4%5Ccdot%201%3D1%5Cend%7Barray%7D%5CRightarrow%20%5Cbegin%7Barray%7D%7Bl%7D1%3D1%5C%5C1%3D1%5Cend%7Barray%7D%5Cright.)
This means that (1,1) is a solution, because both iqualities hold.
Answer:
1/2 divided by 1/4
Step-by-step explanation:
so 2
hope this helps :)
Answer:
7,063
Step-by-step explanation:
90 × 78 + 53 − 20 ÷ 2 = 7,063