Three equal cubes are played adacentiy in a row. find the ratio of total surface area of the new cuboid to that of the sum of the surface area of the three cubes

Which of the following circles have their centers in the third quadrant?

What is the area of the shaded sector?

The students in a class were asked how many siblings they have. the data obtained is represented in the dot plot. the number of students who have no siblings is . the number of students who have three or more siblings is .