Respuesta :

47.20/40= 1.18
1.18 x 55=64.9
$64.9 is the answer
Answer is $64.9

40 books : $47.20
1 book : 47.20/40 = $1.18

If one book costs $1.18, then 55 books would cost:

1.18 x 55 = $64.9