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  3. A circle graph shows how the MegaTech corporation allocates its Research and Dev

A circle graph shows how the MegaTech corporation allocates its Research and Dev

游客2025-02-27  24
问题 A circle graph shows how the MegaTech corporation allocates its Research and Development budget: 14% microphotonics; 24% home electronics; 15% food additives; 29% genetically modified microorganisms; 8% industrial lubricants; and the remainder for basic astrophysics. If the arc of each sector of the graph is proportional to the percentage of the budget it represents, how many degrees of the circle are used to represent basic astrophysics research?
选项 A、8°
B、10°
C、18°
D、36°
E、52°
答案 D
解析 First, determine what percentage of the budget is devoted to basic astrophysics: 14+24+15+29+8=90, so 10% is left over for astrophysics. There are 360° in a circle, so multiply the 10% by 360/100 and you get 36°.
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