Hannah has a grid of squares that has 12 rows with 15 squares in each row. she colors 5 rows of 8 squares in the middle of the grid blue . she colors the rest of the squares red. how many squares does hannah color red?

This size running track is usually called a 400 meter track. however if a person ran as close to the inside as possible on the track they would run less than 400 meters in one lap. how far away from the inside border would someone have to run to make one lap equal exactly 400 meters