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Life expectancy among adults 45 and 65 years of age by family income, sex, and race: United States, average annual 1979-89 In
Life expectancy among adults 45 and 65 years of age by family income, sex, and race: United States, average annual 1979-89 In
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2012-01-15
33
问题
Life expectancy among adults 45 and 65 years of age by family income, sex, and race: United States, average annual 1979-89
In the figure above, the diameter of the circle is 20 and the area of the shaded region is 80π. What is the value of a + b + c + d?
选项
A、144
B、216
C、240
D、270
E、288
答案
E
解析
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本试题收录于:
GRE QUANTITATIVE题库GRE分类
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GRE QUANTITATIVE
GRE
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