Answer:
the teacher does not have enough paint and he needs 1351.5-1324.8 = 26.7 square cm more paint.
Explanation:
The canvas each student has is 5.3 cm wide and 8.5 cm tall. The area of the canvas is (5.3 cm)(8.5 cm) = 45.05 square cm.
The art teacher has 6 bottles of paint, each bottle covers 220.8 square cm of canvas. So he has 6220.8 = 1324.8 square cm of paint.
There are 30 students in the class and each student has a canvas of 45.05 square cm. So in total the students have 30*45.05 = 1351.5 square cm of canvas.
The teacher has 1324.8 square cm of paint and the students have 1351.5 square cm of canvas.
Therefore the teacher does not have enough paint and he needs 1351.5-1324.8 = 26.7 square cm more paint.