Is this sentence correct, am i using the colon cell phones can: make a call at the push of a button, become a flashlight, to a radio.

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

Based on his npr interview,"astrophysicist chroniclesbattle over pluto," why does dr. tyson believe that pluto is america's favorite planet?

What is the topic sentence of paragraph 5 of the passage?