Can someone me with these questions? ***urgent***

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

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?

Compare the cost of the bike trips from the two companies shown.for both the cost in a linear function of the number of days which statements is true