Read the excerpt from The Code Book. Despite the enormous strength of RSA and other modern ciphers, cryptanalysts are still able to play a valuable role in intelligence gathering. Their success is demonstrated by the fact that cryptanalysts are in greater demand than ever before—the NSA is still the world's largest employer of mathematicians.

What is the central idea of this paragraph?

Many math experts work for the National Security Agency.
The RSA computer system makes our country more secure.
Skilled people are still important national security workers.
Computers are better than people at keeping the nation safe.

In walt whitman's attitude toward death in "song of myself" differ from dickinson's attitude in "712: because i could not stop for death"?

Read this excerpt from i never had it made. "it's all that ought to count," he replied. "but it isn't. maybe one of these days it will be all that counts. that is one of the reasons i've got you here, robinson. if you're a good enough man, we can make this a start in the right direction. but let me tell you, it's going to take an awful lot of courage." he was back to the crossroads question that made me start to get angry minutes earlier. he asked it slowly and with great care. "have you got the guts to play the game no matter what happens? " "i think i can play the game, mr. rickey," i said. the next few minutes were tough. branch rickey had to make absolutely sure that i knew what i would face. beanballs would be thrown at me. i would be called the kind of names which would hurt and infuriate any man. i would be physically attacked. could i take all of this and control my temper, remain steadfastly loyal to our ultimate aim? which is the central idea of this excerpt?

Mary is reading a book that has 135 pages. she can read 18 pages in an hour. if she takes h hours to finish reading the book, the equation that can be used to find the value of h is