The average number of siblings that each student has is...

What is 140 squared pleas me i am dumb

Item 1 use the polygon tool to draw a rectangle with a length of 4 units and a height of 2 units. one of the sides of the rectangle falls on line ef , and the rectangle has a vertex of e. each segment on the grid represents 1 unit.

Ireally don't understand this, i'm really an idiot but i want to know how to figure this out. !