Can someone help before my f doesnt go up??

Answer asap and if you do you will get brainliest. catherine buys a gallon of ice cream from the store. after taking it home, she eats a fifth of a gallon of ice cream. her sister eats some of the ice cream as well. if two-thirds of the original amount of ice cream is left, then what fraction of a gallon of ice cream did her sister eat?

If the equation of a perpendicular bisector of a triangle is y = 2x + 7, what is the slope of the side that it is bisecting? explain how you know. 

Acompany specializes in converting people's vhs movies and dvds to digital formats, which, once converted are approximately 4.5 gigabytes in size. once converted, the company uploads the videos to a secure cloud drive, where the customers can retrieve their files. the company uploads the videos every day, from closing time at 5: 00 pm until 9: 00 pm. their internet service provider, has an upload speed of 12 megabytes per second. what is the maximum number of videos the company can upload each evening? (1 gigabyte = 1,024 megabytes) a) 2 b) 37 c) 242 d) 682