Lines 47–56: determine the central idea of these lines

What point is the author trying to make by comparing the travel times of the first transcontinental railroad and the first transcontinental flight?

Which of the following words in bold means “to put before something else”? a) the broken device sat unused in a box. b) jose wanted to defermaking a decision about college until the spring. c) ashok’s counsel was to go to the store tomorrow. d) i would prefer to go to a movie this weekend instead of the play.

One of the author's purposes in the code book is to explain different types of codebreaking to his readers. which line best demonstrates this purpose? a theoretical breakthrough would be a fundamentally new way of finding alice's private key mathematicians have been studying factoring for centuries, and modern factoring techniques are not significantly better than ancient techniques a more recent development is the so-called tempest attack, which aims to detect the electromagnetic signals emitted in a computer's display unit if scientists could build a quantum computer, it would be able to perform calculations with enormous speed mark this and return save and exit next submit