This one if to hard for me

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

Three people are traveling and need to exchange the currency of their native country for the currency of the country they are visiting. drag each exchange to the category that shows the ratio of currencies in that exchange.

Solve the inequaliy: (x^2+2)(x−2)^2(6−2x)> 0