GRE
$$r \triangle s$$
$$r \triangle (-s)$$
The volume of the smaller cylinder
The volume of the material removed
The thousands digit of $$y$$
$$4$$
The number of pieces of ribbon in the basket that are $$8$$ inches long
The number of pieces of ribbon in the basket that are $$13$$ inches long
25000 +道题目
252本备考书籍