Can You Please help me

Pls needs hypehen or no hyphen 1. after serving as principal for ten years, mr. jones will resign this year 2. it's sixty seven degrees outside and it's only february!

Pl true or false: a hyphen can indicate that a word has been split up at the end of a line and continues onto the next line.

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