-2, -4, -8,-16, ... Find the explicit formula

Asap the total attendance for all of a baseball league in 2012 was about 7.5×107 fans, while the attendance for the tornadoes in 2012 was about 1.5×106 fans. about how many times more was the attendance for the entire baseball league than the attendance for just the tornadoes? 50 times more 10 times more 2 times more 5 times more

Me because some of question i don’t understand

Atorch and a battery cost 2.50 altogether.the torch costs 1.50 more than the battery.what fraction of the total price is the torch? give your answer in its simplest form.