## Realated Questions

In the graph alongside, the four labelled points are A(5, 0), B(7, 0), C (7, 9) and D(5, 4). Which of the following is closest to the area of the shaded region?

ABC is a triangle with sides AB = 10, BC = 8, and CA = 7 units. D and E are the feet of the altitudes form the vertices A and B to the respective opposite sides. What is the ratio of the length of CD to that of CE?

The currencies in countries X and Y are denoted by Xs. and Ys. respectively. The exchange rate in 1990 was 1 Xs. = 0.6 Ys. The price level in 2006 in X and Y are 150 and 400 respectively with 1990 as a base of 100. The exchange rate in 2006, based solely on this purchasing power parity consideration, is 1 Xs.=