PLEASE HELP ME?

A scale model of a Boeing 747passenger jet is 14.12 cm long and has a wingspan of 11.92 cm. The model was made at a scale factor of 1/500 . What are the dimensions of a hangar that could fit three of these passenger jets side by side, if the jets need 10 m clearance around them on all sides?

What percent of the circle below is shaded?

Acircle has a circumference of 28.36 units what is the diameter of the circle

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