The president of a company wants to know about how many of the office chairs in the building need to be replaced. which sampling method will result in a sample that is not biased?

she puts notices in the break rooms asking employees to e-mail her about the condition of their chairs.

she inspects every chair in the sales department.

she gives a list of employee names to the maintenance supervisor and tells him to inspect the chair of every fifth employee.

she asks every other employee she sees in the cafeteria about his chair.

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.

cosine

step-by-step explanation: