Ajar contains coins that are all mixed up. you pick out 20 coins. from this selection, 15 turn out to be gold, 3 are silver, and the remaining coins are bronze. if the jar contains 20 gold coins, 30 silver coins, and 50 bronze coins, what is the experimental probability of picking a bronze coin?
50%
10%
4%
2%

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?