A certain website requires that passwords be 4 letters in a row, followed by an integer. How many passwords can be made by following these rules? The password is not case-sensitive. A.
260,000
B.
456,976
C.
4,112,784
D.
4,569,760

i believe the answer is the polygon, heptagon.

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb

9x