Brett golfs for the forestville knights high school team. when he practices his putting, he can make a 10-foot putt 80% of the time. if brett takes 200 putts for practice, what is the standard deviation of the number of putts he will make?

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?