Answer:
13 protons
14 neutrons
13 electrons
Step-by-step explanation:
protons and electrons are mostly always the same
Answer:
8 pi yd.
Step-by-step explanation:
The circumference of a circle can be calculated as follows:
c = 
Where r is the radius of the circumference.
So in our case:
c =
yd.
Answer:
160ft^2
Step-by-step explanation:
Base area is 80ft^2, and the height of the sandbox is 2 ft.
If you want to fill up the sandbox with sand, you will need 80ft^2 * 2(ft).