Answer:
When you're at the grocery store. For example, you're shopping for paper plates, and the price says they are $4.90, you want to round that to $5 because of tax, and because you don't want to be that person telling the cashier that you don't have enough money.
hope this example is good and helps :)
Answer:
can you please post with pictures?
because I don't know what degrees the angles are, therefore can't help
3.21 because 3.2 is 3.20
Moving over one space will add a number to a certain value.
Answer:
182,838 is the answer to this question