During a sale a dress is marked down for a selling price of $90 to a sale price of $81 what is the percent markdown

10%

Step-by-step explanation:

divide 90 into 81

so 81/90=.9

multiply that by 100 and you get 90 so 81 is 90% of 90 so it got marked down 10%

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.