Từ các chữ số 0,1,3,5,6,9 có thể lập thành mấy số tự nhiên có 4 chữ số khác sao cho : a) nhỏ hơn 3580
b) chia hết cho 2
c) là số tự nhiên lẻ
d) chia hết cho 9
giải chi tiết (chia ra các trường hợp như bài vd dưới ảnh giúp e )

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

Aconstruction worker has rope 9 m long he needs to cut it in pieces that are each 3 /5 m long how many such pieces can he cut without having any rope leftover?

Amanda went into the grocery business starting with five stores. after one year, she opened two more stores. after two years, she opened two more stores than the previous year. if amanda expands her grocery business following the same pattern, which of the following graphs represents the number of stores she will own over time?