here are the fuel efficiencies (in mpg) of 12 cars. 52,32,18,14,48,22,36,55,12,20,14,28 . what's is the percentage of these cars with fuel efficiencies less then 48 mpg.​

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Tyler enjoys the fish so much that after his birthday his family decides to take him to a famous aquarium a tank at the aquarium is similar to his tank with the scale factor of 8 how many times greater is the volume of the tank at the aquarium than the volume of tyler tank

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?