Answer:
≈11.7 [ft].
Step-by-step explanation:
1) the ladder and the wall form the right triangle, where the length of the ladder (12 ft) is hypotenuse and the distance between the base of the latter and the base of the wall is the shortest side.
2) the longest side can be calculated according the Pythagoras theorem:
7% is the answer to your question.
look at the hundreds place, if it is 5oo or greater than you round up, if it is less than 5 you round down
in 39,176, the hundreds place is one hundred, which is less than 5, so round it to 39,000