562. PS请大家留意是问是or不是无限循环小数, not difficult I 1/12 ii 1/(10^2) iii 1/(2^10) You might choose I or both of ii and iii, because there is not a choice that is all of them
562. PS请大家留意是问是or不是无限循环小数, not difficult I 1/12 ii 1/(10^2) iii 1/(2^10) You might choose I or both of ii and iii, because there is not a choice that is all of them
520. each sale of a product gives the company revenue of $2.5 and a coupon of $1. The company submits 20% of the coupon for refund. What % is the refund in the revenue?