A bookstore classifies its books by reader group, type of book, and cost. What is the probability that a book selected at random is a child's book, given that it costs $15?
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Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

Which graph depicts the path of a projectile

Without any equipment, you can see stars that are 2{,}800{,}0002,800,0002, comma, 800, comma, 000 light-years away. by looking through a small telescope, you can see stars that are 3{,}112{,}000{,}0003,112,000,0003, comma, 112, comma, 000, comma, 000 light-years away. approximately how many times as far can you see using a small telescope as without any equipment?