Point P is a point on a circle with center point O. Point P is also a point on PQ←→, which is tangent to circle O. Which of the following describes the relationship between radius OP¯¯¯¯¯¯¯¯ and tangent PQ←→?

OP¯¯¯¯¯¯¯¯ and PQ←→ are sometimes perpendicular.

OP¯¯¯¯¯¯¯¯ and PQ←→ are always perpendicular

OP¯¯¯¯¯¯¯¯ and PQ←→ are never perpendicular.

The relationship is dependent on the placement of point P on the circle.

What is the upper quartile in the box plot?

On traditional maps, earth is represented in a flat plane, or by euclidean geometry. however, a globe is a more accurate model that comes from elliptical geometry. how does a globe represent the fact that there are no parallel lines in elliptical geometry? the equator is not parallel to any other latitudinal lines. the north and south poles are never connected by a geodesic. the geodesics connecting the north and south poles never intersect. the geodesics connecting the north and south poles intersect at both of the poles.

If a and −a are numbers on the number line, which expression must give the distance between them? a) 0 b) a c) |2a| d) |a|