单选题 Questions 5-6 refer to the following graph.

Total Sales of Coast Corporation
in 2000:$1,000,000

单选题 If the above circle graph were drawn to scale, then which of the following is closest to the difference in the degree measurements of the central angle of the sector representing Brand C and the central angle of the sector representing Brand D?

A. 5°
B. 12°
C. 18°
D. 25°
E. 43°

A
B
C
D
E

【正确答案】 C

【答案解析】The central angle of the sector representing Brand C is 12% of 360°: (0.12) × 360° = 43.2° The central angle of the sector representing Brand D is 7% of 360°. (0.7) × 360° = 25.2° Finally, 43.2° - 25.2° = 18° **Note this can be done in one step by noticing that the percentage difference between Brands C and D is 5% and 5% of 360 is (0.05) ×360 = 18.

单选题 The total sales of Coast Corporation in 2005 were 50% higher than in 2000. If the dollar value of the sales of Brand A was 25% higher in 2005 than in 2000, then the sales of Brand A accounted for what percentage of total sales in 2005? A. 20% B. 25% C.

A
B
C
D
E

【正确答案】 C

【答案解析】Since total sales in 2000 were $1,000,000, in 2005 sales were $1,500,000 (a 50% increase). In 2000, sales of Brand A were $400,000 (40% of $1,000,000). In 2005 sales of Brand A were $500,000 (25% or [*] more than in 2000). Finally, $500,000 is [*] or [*] of $1,500,000.