What is the greatest possible area of a triangular region with one vertex at the center of a circle of radius 1 and the other two vertices on the circle?
(A)3^/4
(B)1/2
(C)pai/4
(D) 1
(E) 2^
答案选B 什么情况下这个三角形的面积是最大的啊
A certain car averages 25 miles per gallon of gasoline when driven in the city and 40 miles per gallon when driven on the highway.According to these rates, which of the following is closest to the number of miles per gallon that the car averages when it is driven 10 miles in the city and then 50 miles on the highway?
(A) 28
(B) 30
(C) 33
(D) 36
(E) 38
答案选D
96.10591-!-item-!-187;#058&007292
According to the directions on a can of frozen orange juice concentrate, 1 can of concentrate is to be mixed with 3 cans of water to make orange juice.How many 12-ounce cans of the concentrate are required to prepare 200 6-ounce servings of orange juice?
(A)25
(B)34
(C)50
(D)67
(E)100
答案选A
When a certain tree was first planted, it was 4 feet tall, and the height of the tree increased by a constant amount each year for the next 6 years.At the end of the 6th year, the tree wastaller than it was at the end of the 4th year.By how many feet did the height of the tree increase each year?
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发表于 2008-4-7 00:08:00
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