Find the arc length round answer to the nearest tenth

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

What is the factored form of the following expressions? d^2 – 13d + 36

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?