aurora bought a book with a new five dollar bill she got one-dollar bill two quarters and a dime back how much was the book

Given that de, df, and ef are midsegments of △abc, and de=3.2 feet, ef=4 feet, and df=2.4 feet, the perimeter of △abc is .

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

Which shows a reasonable estimation for 124% of 42 using the distributive property?