Areport stated that 281,305,769 people visited us national parks in 2010. the author of a travel guide rounded the number of visitor to 281,300,000. to which place value did the author round the number of people who visited us. national parks in 2010?

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.