Question 1052752
Area of the brick path:  {{{pi*(9-5)^2}}}
{{{pi*16}}}
{{{16*pi}}}, square feet.



How many bricks:  {{{16*pi*(1/2)(sqrFeet)(bricks/sqrFeet)=8pi}}}.


This needs to be  (most likely) a Natural Number, 25 being the best choice.

If some breaks needed to be cut to fill missing spots, then you might go up to maybe {{{25&1/8}}}.