Hello there! Let me help you on these questions!
A. 60209064 is the standard form of 60,000,000+200,000+9,000+60+4. B. To remember what < is, just remember this hint. Think of < as a crocodiles mouth. It is open. Which ever number it is open towards, that is the bigger number. So, 145,679,108 <146,780,198 is correct.
Thanks! Hope it helps!