The Answer To This Problem is: C.-4
You would keep the 12, and change the .13 into 13/100. 13 is prime, so it can't be simplified, and you would just leave it as 12 13/100 inches
Answer:
use common sense!!!!!!!!!!!!!!!!!!!!!
Answer:
![S=6600\pi \text{ mm}^2](https://tex.z-dn.net/?f=S%3D6600%5Cpi%20%5Ctext%7B%20mm%7D%5E2)
![S\approx 20724 \text{ mm}^2](https://tex.z-dn.net/?f=S%5Capprox%2020724%20%5Ctext%7B%20mm%7D%5E2)
Step-by-step explanation:
A can of fruit is geometrically a cylinder.
We are talking about the <u>surface area of a cylinder</u>:
![S=2\pi rh+2\pi r^2](https://tex.z-dn.net/?f=S%3D2%5Cpi%20rh%2B2%5Cpi%20r%5E2)
![\pi \approx 3.14](https://tex.z-dn.net/?f=%5Cpi%20%5Capprox%203.14)
![r: \text{radius}](https://tex.z-dn.net/?f=r%3A%20%5Ctext%7Bradius%7D)
![h: \text{height}](https://tex.z-dn.net/?f=h%3A%20%5Ctext%7Bheight%7D)
Factoring, we have:
![S=2\pi r (h+r)](https://tex.z-dn.net/?f=S%3D2%5Cpi%20r%09%28h%2Br%29)
Calculating the surface area of the can of fruit:
![S=2\pi (30) (80+30)](https://tex.z-dn.net/?f=S%3D2%5Cpi%20%2830%29%09%2880%2B30%29)
![S=2\pi (30) (110)](https://tex.z-dn.net/?f=S%3D2%5Cpi%20%2830%29%09%28110%29)
![S=6600\pi](https://tex.z-dn.net/?f=S%3D6600%5Cpi)
![S\approx 20724 \text{ mm}^2](https://tex.z-dn.net/?f=S%5Capprox%2020724%20%5Ctext%7B%20mm%7D%5E2)
Solution:above picture
Answer for the questions: Substitution method would be the best to solve the problem because we have two unknown value and the substitution method is most useful and an easier method for solving problem with two equations with 2 unknown values.