Step-by-step explanation:
part A:

part B:
![Area_{_{surface}}=3.14*(15+9)=3.14*24=75.36[units^2].](https://tex.z-dn.net/?f=Area_%7B_%7Bsurface%7D%7D%3D3.14%2A%2815%2B9%29%3D3.14%2A24%3D75.36%5Bunits%5E2%5D.)
Put it in a more simplified form
Answer:

Step-by-step explanation:
The first thing that I noticed was that all of the terms had a common factor of
. You can therefore factor that out first:

Now, you have a quadratic equation inside the parentheses. Factoring, you find that the roots are -0.2 and 3, meaning that you can further factor this expression to be:

Hope this helps!
Answer:
What's the question?
Step-by-step explanation: