Answer:
113.04 cm^2
Step-by-step explanation:
To find the area, you do radius squared, multiplied by 
Radius is half of the diameter. 12/2 is 6
6^2×3.14=113.1
In order of missing boxes, 15 and 76
8 is ur answer hope this helps
Step-by-step explanation:
(5x+3x)²
(8x)²
8×8=64
x×x=x²
so (8x)² =64x²
if the cylinder has a diameter of 4, then its radius is half that, or 2.
![\bf \textit{surface area of a cylinder}\\\\ SA=2\pi r(h+r)~~ \begin{cases} r=radius\\ h=height\\[-0.5em] \hrulefill\\ r=2\\ h=5 \end{cases}\implies SA=2\pi (2)(5+2)\implies SA=4\pi (7) \\\\\\ SA=28\pi \implies SA\approx 87.964594\implies \stackrel{\textit{rounded up}}{SA=88.0}](https://tex.z-dn.net/?f=%5Cbf%20%5Ctextit%7Bsurface%20area%20of%20a%20cylinder%7D%5C%5C%5C%5C%20SA%3D2%5Cpi%20r%28h%2Br%29~~%20%5Cbegin%7Bcases%7D%20r%3Dradius%5C%5C%20h%3Dheight%5C%5C%5B-0.5em%5D%20%5Chrulefill%5C%5C%20r%3D2%5C%5C%20h%3D5%20%5Cend%7Bcases%7D%5Cimplies%20SA%3D2%5Cpi%20%282%29%285%2B2%29%5Cimplies%20SA%3D4%5Cpi%20%287%29%20%5C%5C%5C%5C%5C%5C%20SA%3D28%5Cpi%20%5Cimplies%20SA%5Capprox%2087.964594%5Cimplies%20%5Cstackrel%7B%5Ctextit%7Brounded%20up%7D%7D%7BSA%3D88.0%7D)