1106G数学答疑贴~

hua11UID：3027785

118# 窝头拌咸菜

What is the maximum number of cubes with sides of a length 0.5s that could fit inside a cube with sides of length 2s?$

hua11UID：3027785

119# rockfire

文字题多做些题就可以克服了，一般没有复杂的词汇。文字题总是有的，个人觉得题目真的是越来越长的说法不实

dlzjp123UID：2972682

数学大黄本Sec3-23
3（r/3+s/4+5/3)    r-s+5
我选D，可答案是C

dlzjp123UID：2972682

大黄本Sec16-2
1.9的三次方   1.999的二次方
判断大小有什么简便方法么

guchaoUID：2931614

快被文字题整疯了，文字题真的会越来越长吗？
问题：No.9 的第二套
8. A merchant made a profit of $2.75 on the sale price of a seater that cost the merchant $12.25.
比较：
The profit expressed as percent of the cost to the merchant
The profit expressed as a percent of the sale price     

30.A certain recipe makes enough batter for exactly 8 circular pancakes that are each 10 inches in diameter. How many circular pancakes, each 5 inches in diameter and of the same thickness as the 10 inch pancakes, should the recipe make?

谢谢大家~

hua11UID：3027785

125# dlzjp123

sec3-23 选D噢，s的大小不知道呢
sec16-2 将1.9近似为2就行了。

hua11UID：3027785

126# guchao

8、
A-成本利润率=2.75/12.25
B-销售利润率=2.75/15
所以A>B

30、是某一配方蛋糕用面糊的体积问题，直径为10的可以做8个，问如果厚度相同，这些面糊可以做直径为5的多少个。可以做32个。厚度略去，有X * Pai * 5/2 * 5/2 = 8 * Pai * 10/2 * 10/2

guchaoUID：2931614

128# hua11
O~~谢谢斑斑了~我发现数学真是我的硬伤啊5555~~~~每个section做下来都会有那么一两道看不懂的题，再加粗心错几道。。。真抓狂

jj@2012UID：2863039

1. A gardener wishes to plant 5 bushes in a straight row. Each bush has flowers of a different solid color(white,yellow,pink,red and purple).how many ways can the bushes be arranged so that the middle bush is the one with red flowers.
(A=24)
碰到概率题我就很崩溃，无从下手。。。

jj@2012UID：2863039

2. Circular region C has a radius of 1 centimeter  and circumference of x centimeters: if the region has an area of y square centimeters, what is the ratio of x to y.
答案选A=2,硬是没明白。。。。

hua11UID：3027785

131# jj@2012

130楼
1、因为每个bush的花色不一样，中间的为红色，其余4个bush的花色就是4的全排列了，就是从4个数中取出4个数进行排列，即4！=4*3*2*1=24
可以这样理解：首先确定第1个bush的花色，有4种可能；然后确定第2个bush花色只剩下3种可能了；第4个bush和第5个bush依次只有2种、1种可能了。

2、x代表圆的周长=2*Pai*1
y代表圆的面积=Pai*1*1
x/y=2

huangcan01UID：2831310

29. David and Michael charged Mr. Jimenez $3,000 to remodel his basement. To complete the project, David worked 4 days alone, Michael worked 1 day alone, and they worked 10 days together. If they each received the same amount of money for each day that they worked, how much of the $3,000 did David receive?
   (A) $1,800
   (B) $1,750
   (C) $1,680
   (D) $1,575
   (E) $1,200
这是98.4的题，我真是一点都不明白为什么选C
" If they each received the same amount of money for each day that they worked,"他们到底是一起还不一起工作呢？
额。。。。一下反应过来了。。。D，M先单独工作在一起工作。。。。⊙﹏⊙b所以工资比是14:11
明白了。。。不麻烦版主了。。。

redswallowUID：2672677

114# hua11

欧 谢谢orz

miao65272156UID：2546966

n/4 + r/8

=
s/8+t/6

n, r, s, and t are positive integers.

14.
2n + r

2s + t

答案是A，我怎么觉得是无法确定？

The odds in favor of winning a game can be found

by computing the ratio of the probability of wining to

the probability of not winning. if the probability that

Pat will win a game is 4/9, what are the odds that Pat

will win the game?

(A) 4 to 5

(B) 4 to 9

(C) 5 to 4

(D) 5 to 9

(E) 9 to 5

答案也是A，题目看不懂，谁帮忙解释下？

老冯UID：2886825

135# miao65272156

The odds in favor of winning a game can be found

by computing the ratio of the probability of wining to

the probability of not winning. if the probability that

Pat will win a game is 4/9, what are the odds that Pat

will win the game?

(A) 4 to 5

(B) 4 to 9

(C) 5 to 4

(D) 5 to 9

(E) 9 to 5

答案也是A，题目看不懂，谁帮忙解释下

这个很easy呀，就是说Odds=赢得几率/不赢的几率呗，那就是4/9 除以1-4/9 等于4/5，就是A了，第一道题我也不太会，等牛人解答~