Bruce needs to practice the piano for 1 2/3 hours. He has been practicing for ¾ of an hour. How much longer must he practice?(first person gets brain plz help i need it for test its a alot of my grade

For how answer my question this will be the last question can you answer in math subject

Bella want to know what the students at her school think of her show. which is the best group to survey to find this information a. go to the mall and ask all of the students she recognizes from school b. ask her viewers to call in durning an episode of the show c. get a list of students at her school from the office and use a random number generator to pick 30 of them d. get a list of students at her school from the office and pick the first 30 students on the list

With number 11 ( show how you got the answer)