Five children are the following ages: 12,13,11,11 and 13. What is their mean age?

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c

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.