How to simplify trigonometric expressions.

Apackage of orgainc strwberries costs $1.50 while there in season and $2.25 when not in season what the percent increase

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?

Find the solution on the interval [0, 2pi)