美国学术能力评估考试（SAT）
单选题The ratio of r to s is 3 to 4. The ratio of s to t is 2 to 9. What is the ratio of r to t?A 1 to 3B 1 to 6C 2 to 9D 3to10E 4 to 5
题目
1 to 3
1 to 6
2 to 9
3to10
4 to 5
相似问题和答案
第1题：
10 Which of the following factors would cause a company’s gearing ratio to fall?
1 A bonus issue of ordinary shares.
2 A rights issue of ordinary shares.
3 An issue of loan notes.
4 An upward revaluation of non-current assets.
A 1 and 3
B 2 and 3
C 1 and 4
D 2 and 4
第2题：
设有如下关系表： R S T A B C A B C A B C 1 1 2 3 1 3 1 1 2 2 2 3 2 2 3 3 1 3 则下列操作中正确的是( )。
A．T=R∩S
B．T=RUS
C．T=R×S
D．T=R/S
第3题：
A.Π3,4(R⋈S)
B.Π2,3 (R⋈1=3S)
C.Π3,4(σ1=1(R×S))
D.Π3,4(R⋈1=1S)
第4题：
For the year just ended, N company had an earnings of$ 2 per share and paid a dividend of $ 1. 2 on its stock. The growth rate in net income and dividend are both expected to be a constant 7 percent per year, indefinitely. N company has a Beta of 0. 8, the risk - free interest rate is 6 percent, and the market risk premium is 8 percent.
P Company is very similar to N company in growth rate, risk and dividend. payout ratio. It had 20 million shares outstanding and an earnings of $ 36 million for the year just ended. The earnings will increase to $ 38. 5 million the next year.
Requirement :
A. Calculate the expected rate of return on N company 's equity.
B. Calculate N Company 's current price-earning ratio and prospective price - earning ratio.
C. Using N company 's current price-earning ratio, value P company 's stock price.
D. Using N company 's prospective price - earning ratio, value P company 's stock price.
A. The expected rate of return on N company's equity =6% +0. 8*8% =12.4%
B. Current price -earning ratio = (1. 2/2) * (1 +7% )/ (12.4% -7% ) =11. 89
Prospective price - earning ratio = (1. 2/2) / (12. 4% - 70% ) =11. 11
C. P company's stock = 11. 89* 36/20 = 21. 4
D. P company's stock = 11. 11* 38. 5/20 = 21. 39
第5题：
设R和S都是二元关系，那么与元组演算表达式 {t| R(t)∧(
u)(S(u)∧u[1]≠t[2])} 不等价的关系代数表达式是)______。
A．π1,2(σ2≠3 (R×S))
B．π1,2 (σ2≠1 (R×S))
C．π1,2 (R
S)
D．π3,4(σ1≠4 (S×R))
第6题：
8 P and Q are in partnership, sharing profits in the ratio 2:1. On 1 July 2004 they admitted P’s son R as a partner. P
guaranteed that R’s profit share would not be less than $25,000 for the six months to 31 December 2004. The profitsharing
arrangements after R’s admission were P 50%, Q 30%, R 20%. The profit for the year ended 31 December
2004 is $240,000, accruing evenly over the year.
What should P’s final profit share be for the year ended 31 December 2004?
A $140,000
B $139,000
C $114,000
D $139,375
80,000 + 60,000 – 1,000 = 139,000
第7题：
A rate ;
B value ;
C ratio
第8题：
设有如下关系表： R S T A B C A B C A B C 1 1 2 3 1 3 1 1 2 2 2 3 2 2 3 3 1 3 则下列操作中正确的是( )。
A．T=R∩S
B．T=R∪S
C．T=R×S
D．T=R/S
解析：并(∪)：关系R和S具有相同的关系模式，R和S的并是由属于R或属于S的元组构成的集合。
第9题：
设关系R和S都是二元关系，那么与元组表达式 {t|u)(|v)(R(u)∧S(v)∧u[1]=v[1]∧t[1]=v[1]∧t[2]=v[2])} 等价的关系代数表达式是______。
A．π3,4 (R|
S)
B．π2,3 (R|
S)
C．π3,4 (R|
S)
D．π3,4 (σ1=1 (R×S))
第10题：
A. 1N4n2Ig B.4E9e6St
C. 3T4t6Qq D.4R5R9Pp