Ou write a short story, but you want to make sure your work is protected before you post it online. what should you do to protect your copyright? (site 1)

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

Which of the following represents the range of the graph of f(x) below

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5