Answer:
12x+4x-7y+45b+78a-44b+1a+1z+0d+1.1a+1.1a+2+2+2
108 : 1
Explanation:
1 foot = 12 inches
81 foot = 81 * 12 = 972 inches
Scale factor = 81 feet : 9 inches
= 972 : 9
= 972 ÷ 9 : 9÷9
= 108 : 1
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