:) Mathistillfun's answer to Ardi Azman's Secondary 4 E Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
:) Mathistillfun
:) Mathistillfun's answer
37 answers (A Helpful Person)
Purchase frequency is used for marketing database. In this case, it is not used for the physics thing if u get what i mean.