the base of the ladder is 18ft away from the wall
With geometric sequences, if you divide a term by the term before it you'll get the common ratio. That's how they are all constructed, and in this problem:

So -1/4 is our common ratio.
Answer:

Step-by-step explanation:
let x=11.510510510...
multiply by 1000
1000x=11510.510510...
again multiply by 1000
1000,000 x=11510510.510510...
subtract
999,000 x=1,1 49 9,000
x=11,499,000/999000=3,833,000/333,000=3833/333
333 ) 3833 (11
-333
--------
503
- 333
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170
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7x + 2 is the correct answer
You’re answer would be $28,000