单项选择题

At Leo's Lumberyard, an 8-foot long wooden pole costs $3.00. At this rate, what is the cost, in cents, of a pole that is 16 inches long（）

A、0.5
B、48
C、50
D、64
E、96

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单项选择题

In the figure below, if the radius of circle O is 10, what is the length of diagonal AC of rectangle OABC（）

A.A
B.B
C.C
D.D
E.E

单项选择题

In writing all of the integers from 1 to 300, how many times is the digit 1 used（）

A、60
B、120
C、150
D、160
E、180

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