Answer:
9.7 ft
Explanation:
Use the formula for the area of a regular polygon with "n" sides with lengths "s" and apothem a:
A= 1/2 ans
1. Substitute A= 310.4
2. n= 8 (for octagon)
3. s = 8 (length of side)
310.4 = 1/2 (a)(8)(8)
310.4= 32a
a= 9.7 ft
Length of apothem: 9.7 ft