Every time Amanda made a fold, the number of parts doubled.

Made 1 fold -> 2 parts

Made 2 folds -> 4 parts, or 2²

Made 3 folds -> 8 parts, or 2³

So 5 folds -> 2⁵ parts = 32

Number of creases is always 1 less than number of parts.

So after 5 folds, there were (32 – 1) = 31 creases

Thank you very much for help