A school board is made up of 12 members. How many ways can the board create a sub-committee of 4 members to review the new math textbooks?

Can someone me out here and the tell me the greatest common factor

The art class is planning to paint a mural on an outside wall. this figure is a scale drawing of the wall. width: 11 in length: 28 in unit rate: 1.5 ft per in. write the ratio of the area of the drawing to the area of the actual mural. write your answer as a unit rate. show that this unit rate is equal to the square of the unit rate 1.5 ft per in

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.