Find the value of the trigonometric ratio​

Me find the measure to side c and the process to solve the problem you appreciate it : )

Christine went shopping and bought each of her six six nephews a? gift, either a video costing? $14.95 or a cd costing? $16.88. she spent ? $ 97.42 97.42 on the gifts. how many videos and how many cds did she? buy?

Which graph represents an even function?