Which two methods can a reader use to identify the main idea of a text

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

What are the most plentiful organisms in an ecosystem

Read the excerpt from frederick douglass’s speech “what to the slave is the fourth of july? ” go where you may, search where you will, roam through all the monarchies and despotisms of the old world, travel through south america, search out every abuse, and when you have found the last, lay your facts by the side of the everyday practices of this nation, and you will say with me, that, for revolting barbarity and shameless hypocrisy, america reigns without a rival. which phrase best describes the connotation of the word “reigns”? a sense of opportunity and growth a sense of fear and anxiety a sense of compassion and humanity a sense of oppression and domination