Please help me out, I don't get it

The poll report includes a table titled, “americans using cash now versus five years ago, by age.” the age intervals are not equal. why do you think the gallup organization chose the age intervals of 23–34, 35–54, and 55+ to display these results?

What percent of the butterfly tents contain at most 10 cocoons

Why is 4.125 + the square root of 3 irrational