Explain the meaning of the sentence "Once you've learnt to use it, there's no end to what you can do"

Is the book the outsiders a realistic story? plz explain. asap!

Read the passage. the boy took care to sit on the far side of the room, away from the purse, where he thought she could easily see him out of the corner of her eye if she wanted to. he did not trust the woman not to trust him. and he did not want to be mistrusted now. which best describes roger's traits based upon his thoughts and feelings? question 4 options: he is exhausted and depressed. he is wild and impatient he is cautious and wise he is angry and temperamental.

Based on the facts presented in the riddle of the rosetta stone, what is the most logical prediction that can be made about the progress made to decipher the hieroglyphs on the rosetta stone?