One layer of a rectangular prism is built from 11-inch cubes as shown. ​

​Layers equal to this one shown are added to create new rectangular prisms.

​Enter a number in each box to complete the table.

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

The circumference of a redwood tree trunk is 20π ft, and it is 100 ft tall. what is the approximate volume of the redwood tree trunk? 1,000π ft3 10,000π ft3 4,000π ft3 40,000π ft3

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?