In 1900, the average life expectancy in the United States was 47.3 years. In 2015, the average life expectancy was 78.8 years. Calculate the percentage increase in life expectancy from 1900 to 2015

66.6%.

Step-by-step explanation:

We have been given that in 1900, the average life expectancy in the United States was 47.3 years. In 2015, the average life expectancy was 78.8 years.

We will use percent increase formula to solve our given problem.

Round to nearest tenth.

Therefore, the percentage increase in life expectancy from 1900 to 2015  is 66.6%.

question is incomplete.

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.