School lunches cost $2.25 each. In a school, 25% of 312 students bring lunch from home. How much money does the school make from selling school lunches if all of the remaining students buy lunch?

And explain how you got it so i can understand future problems : 3

Sal is tiling his entryway. the floor plan is drawn on a unit grid. each unit length represents 1 foot. tile costs $1.35 per square foot. how much will sal pay to tile his entryway? round your answer to the nearest cent.

What is the perimeter of trapezoid jklm? + units 2 + + units 9 + units 9 + + units