Ihave $2.40 consisting of nickels and dimes. if i have 30 coins how many of each do i have

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

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.

What function has a range {yly< 5}? question on picture above^