How many 135-inch-thick books can fit on a 1412
-inch-long bookshelf?

You can fit

books on the bookshelf.

no statements but ok.

the statement that best describes the idea of manifest destiny that was used in the 19th century would be that "it was fate that the united states would continue to  expand westward," since people thought the us was "destined" to do so. 

answer; i believe the correct answer is (favorable balance);

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.