Answer:
4698 sq feet
Explanation:
Given scale 1" : 9'
= 1" : (9 × 12)"
= 1 : 108
area scale = 1² : 108²
= 1 : 11664
blueprint : actual = blueprint : actual
58 sq inch : actual = 1 : 11664
actual = (58 × 11664) sq inch
= (676512 ÷ 12²) sq feet
= 4698 sq feet