GRE
The area of the circle
$$\frac{1600}{π}$$
The ratio of the sum of the areas of the black sections to the sum of the areas of the white sections
$$\frac{x}{y}$$
The x -coordinate of the vertex at the right angle of the triangle
The y -coordinate of the vertex at the right angle of the triangle
The probability that A or B or both will occur tomorrow
0.92
$$\frac{2^{27}-2^{24}}{8^{27}-8^{26}}$$
$$2^{-54}$$
25000 +道题目
236本备考书籍