A. Best the reason why it is not better (even though it sounds right) is because it says "out of the five cousins" there for we are comparing ben to five other people and he is the best.
Answer:
One of his least favorite duties is giving presentations
6. 0.2 on the second line of the number line before 1 and 1/5 as a fraction
7. 0.9 on the last line before 1 of the number line and 9/10 as a fraction
8. 0.3 on the third line of the number line before 1 and 3/10 as a fraction
9. 0.7 on the seventh line of the number line before 1 and 7/10 as a fraction
10. 1.0 on number 1 and 1/1 or 10/10
Sorry if it’s confusing but I hope it helps :)