How do you change a rational number to a decimal? can you give an example?

Evaluate the expression. (9 + 5)(3 + 2)0

Which image (a’ b’ c’ d’) of abcd cannot he produced using only reflections ?

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?