Okay please help me i need this done

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits

At a book fair, joe bought 24 books at 3 for $5 and had $2 left. how much money did he have at first?

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?