The figure above shows the dimensions of a semicircular cross section of a one-way tunnel.The single traffic lane is 12 feet wide and is equidistant from the sides of the tunnel.If vehicles must clear the top of the tunnel by at least ½ foot when they are inside the traffic lane, what should be the limit on the height of vehicles that are allowed to use the tunnel?
The figure above shows the dimensions of a semicircular cross section of a one-way tunnel.The single traffic lane is 12 feet wide and is equidistant from the sides of the tunnel.If vehicles must clear the top of the tunnel by at least ½ foot when they are inside the traffic lane, what should be the limit on the height of vehicles that are allowed to use the tunnel?
A.5½ ft B.7½ ft
C.8 ½ ft D.9½ ft E.10 ft -------------------------------------------------------------------------------------------------- Q25: A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 of the 3 cars each time that passenger rides the roller coaster.If a certain passenger is to ride the roller coaster 3 times, what is the probability that the passenger will ride in each of the 3 cars?
A.0 B.1/9 C.2/9 D.1/3 E.1
------------------------------------------------------------------------------------------------------------ Q26: There are 8 books on a shelf, of which 2 are paperbacks and 6 are hardbacks.How many possible selections of 4 books from this self include at least one paperback?
A.40 B.45 C.50 D.55 E.60
-------------------------------------------------------------------------------------------------- Q25: A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 of the 3 cars each time that passenger rides the roller coaster.If a certain passenger is to ride the roller coaster 3 times, what is the probability that the passenger will ride in each of the 3 cars?
A.0 B.1/9 C.2/9 D.1/3 E.1
------------------------------------------------------------------------------------------------------------ Q26: There are 8 books on a shelf, of which 2 are paperbacks and 6 are hardbacks.How many possible selections of 4 books from this self include at least one paperback?
The figure above shows the dimensions of a semicircular cross section of a one-way tunnel.The single traffic lane is 12 feet wide and is equidistant from the sides of the tunnel.If vehicles must clear the top of the tunnel by at least ½ foot when they are inside the traffic lane, what should be the limit on the height of vehicles that are allowed to use the tunnel?
The figure above shows the dimensions of a semicircular cross section of a one-way tunnel.The single traffic lane is 12 feet wide and is equidistant from the sides of the tunnel.If vehicles must clear the top of the tunnel by at least ½ foot when they are inside the traffic lane, what should be the limit on the height of vehicles that are allowed to use the tunnel?
A.5½ ft B.7½ ft
C.8 ½ ft D.9½ ft E.10 ft -------------------------------------------------------------------------------------------------- Q25: A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 of the 3 cars each time that passenger rides the roller coaster.If a certain passenger is to ride the roller coaster 3 times, what is the probability that the passenger will ride in each of the 3 cars?
A.0 B.1/9 C.2/9 D.1/3 E.1
------------------------------------------------------------------------------------------------------------ Q26: There are 8 books on a shelf, of which 2 are paperbacks and 6 are hardbacks.How many possible selections of 4 books from this self include at least one paperback?
A.40 B.45 C.50 D.55 E.60
-------------------------------------------------------------------------------------------------- Q25: A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 of the 3 cars each time that passenger rides the roller coaster.If a certain passenger is to ride the roller coaster 3 times, what is the probability that the passenger will ride in each of the 3 cars?
A.0 B.1/9 C.2/9 D.1/3 E.1
------------------------------------------------------------------------------------------------------------ Q26: There are 8 books on a shelf, of which 2 are paperbacks and 6 are hardbacks.How many possible selections of 4 books from this self include at least one paperback?
A.40 B.45 C.50 D.55 E.60
Q2:头疼的余数
When positive integer x is divided by positive integer y, the remainder is 9.If x/y = 96.12, what is the value of y?
The figure above shows the dimensions of a semicircular cross section of a one-way tunnel.The single traffic lane is 12 feet wide and is equidistant from the sides of the tunnel.If vehicles must clear the top of the tunnel by at least ½ foot when they are inside the traffic lane, what should be the limit on the height of vehicles that are allowed to use the tunnel?
The figure above shows the dimensions of a semicircular cross section of a one-way tunnel.The single traffic lane is 12 feet wide and is equidistant from the sides of the tunnel.If vehicles must clear the top of the tunnel by at least ½ foot when they are inside the traffic lane, what should be the limit on the height of vehicles that are allowed to use the tunnel?
A.5½ ft B.7½ ft
C.8 ½ ft D.9½ ft E.10 ft -------------------------------------------------------------------------------------------------- Q25: A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 of the 3 cars each time that passenger rides the roller coaster.If a certain passenger is to ride the roller coaster 3 times, what is the probability that the passenger will ride in each of the 3 cars?
A.0 B.1/9 C.2/9 D.1/3 E.1
------------------------------------------------------------------------------------------------------------ Q26: There are 8 books on a shelf, of which 2 are paperbacks and 6 are hardbacks.How many possible selections of 4 books from this self include at least one paperback?
A.40 B.45 C.50 D.55 E.60
-------------------------------------------------------------------------------------------------- Q25: A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 of the 3 cars each time that passenger rides the roller coaster.If a certain passenger is to ride the roller coaster 3 times, what is the probability that the passenger will ride in each of the 3 cars?
A.0 B.1/9 C.2/9 D.1/3 E.1
------------------------------------------------------------------------------------------------------------ Q26: There are 8 books on a shelf, of which 2 are paperbacks and 6 are hardbacks.How many possible selections of 4 books from this self include at least one paperback?
The figure above shows the dimensions of a semicircular cross section of a one-way tunnel.The single traffic lane is 12 feet wide and is equidistant from the sides of the tunnel.If vehicles must clear the top of the tunnel by at least ½ foot when they are inside the traffic lane, what should be the limit on the height of vehicles that are allowed to use the tunnel?
The figure above shows the dimensions of a semicircular cross section of a one-way tunnel.The single traffic lane is 12 feet wide and is equidistant from the sides of the tunnel.If vehicles must clear the top of the tunnel by at least ½ foot when they are inside the traffic lane, what should be the limit on the height of vehicles that are allowed to use the tunnel?
A.5½ ft B.7½ ft
C.8 ½ ft D.9½ ft E.10 ft -------------------------------------------------------------------------------------------------- Q25: A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 of the 3 cars each time that passenger rides the roller coaster.If a certain passenger is to ride the roller coaster 3 times, what is the probability that the passenger will ride in each of the 3 cars?
A.0 B.1/9 C.2/9 D.1/3 E.1
------------------------------------------------------------------------------------------------------------ Q26: There are 8 books on a shelf, of which 2 are paperbacks and 6 are hardbacks.How many possible selections of 4 books from this self include at least one paperback?
A.40 B.45 C.50 D.55 E.60
-------------------------------------------------------------------------------------------------- Q25: A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 of the 3 cars each time that passenger rides the roller coaster.If a certain passenger is to ride the roller coaster 3 times, what is the probability that the passenger will ride in each of the 3 cars?
A.0 B.1/9 C.2/9 D.1/3 E.1
------------------------------------------------------------------------------------------------------------ Q26: There are 8 books on a shelf, of which 2 are paperbacks and 6 are hardbacks.How many possible selections of 4 books from this self include at least one paperback?
A.40 B.45 C.50 D.55 E.60作者: winny莹 时间: 2011-2-23 14:28
哎呀！！！怎么会这样啊？？可以删掉吗？作者: clover928 时间: 2011-2-23 20:00
When positive integer x is divided by positive integer y, the remainder is 9.If x/y = 96.12, what is the value of y?
A.96 B.75 C.48 D.25 E.12 这一题，虽然我看了答案也不是很清楚为什么，但是我知道应该怎么做，我做这种题目的方法就是：用ABCDE各个选项除以0.12，结果是整数的就是正确选项作者: winny莹 时间: 2011-2-23 20:12
谢谢，指教！作者: Gail小M 时间: 2011-2-23 20:35
X=96.12Y , 96 is a integer, thus the remainder=0.12Y=9 Y=75作者: zetahisoka 时间: 2011-2-23 20:46
我是这样想的，x/y=a+9; x/y=96.12 96.12y-9=ay;其实a就是96. 所以y=75.作者: zetahisoka 时间: 2011-2-23 20:47
另外你贴的图都看不见的。。作者: clover928 时间: 2011-2-26 13:25
楼主，第一题给你OG12的解释： The remainder is 9 when x is divided by y,so x=yq+9 fo some positive integer q. Dividing both sides by y gives x/y=q+9/q. But, x/y=96.12=96+0.12 Thus,q=96 and 9/y=0.12 9+0.12y y=75作者: winny莹 时间: 2011-2-26 13:53
真的非常非常感谢大家！我的题目编辑得这么烂，大家还这么耐心，甚至把OG解释打上来！ ！话不多说，祝大家700加加加加加！作者: clover928 时间: 2011-2-26 17:31
Q25: A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 of the 3 cars each time that passenger rides the roller coaster.If a certain passenger is to ride the roller coaster 3 times, what is the probability that the passenger will ride in each of the 3 cars?
A.0 B.1/9 C.2/9 D.1/3 E.1 这一题是3X2X1/3X3X3=2/9 Q26: There are 8 books on a shelf, of which 2 are paperbacks and 6 are hardbacks.How many possible selections of 4 books from this self include at least one paperback?
