What is the slope of the line

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

What is the graph of the function fx x+2/x-3?

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?