2010 AMC12B 真题

2010 AMC12B

Problem 1

Makarla attended two meetings during her -hour work day. The first meeting took minutes and the second meeting took twice as long. What percent of her work day was spent attending meetings?

Markala 在她工作的 小时里参加了 次会议。第一场会议耗时 9 2 45 分钟，第二场会议时长是 第一场的 倍。问她工作总时间的百分之多少是花在了会议上？ 2

(A) 15 (B) 20 (C) 25 (D) 30 (E) 35

Problem 2

A big is formed as shown. What is its area?

一个大的 字形如下图所示。问它的面积是多少？

Problem 3

A ticket to a school play cost dollars, where is a whole number. A group of 9th graders buys tickets costing a total of $ , and a group of 10th graders buys tickets costing a total of $ . How many values for are possible?

一张学校戏剧票要花 美元，其中 是整数。一组九年级学生买的票总共花了 48 美元，一组 十年级学生买的票总共花了 64 美元。问 有多少个可能的值？ x

(A) 1 (B) 2 (C) 3 (D) 4 (E) 5