Answer:
25pi
Step-by-step explanation:
This mulch would cover the circular area, and not just placed on the outside. Therefore: it's area. Now, to calculate how much you'd need
Area of a circle is Pi*r^2
Multiply r (the radius) by itself to get 25, then multiply pi. Since 25pi looks like a simpler answer than 78.5398163, that's what I'd stick with for the answer, unless they say otherwise...
