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?A1 to 3B1 to 6C2 to 9D3to10E4 to 5
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 3
B
1 to 6
C
2 to 9
D
3to10
E
4 to 5
参考解析
解析：
根据题干r/s=3/4，s/t= 2/9，所以s=(2t)/9。因为r/s=3/4，r/s=r/{(2t)/9}=3/4，(9r)/(2t)=3/4，所以r/t=(3/4)(2/9)=1/6，故选B。
根据题干r/s=3/4，s/t= 2/9，所以s=(2t)/9。因为r/s=3/4，r/s=r/{(2t)/9}=3/4，(9r)/(2t)=3/4，所以r/t=(3/4)(2/9)=1/6，故选B。
相关考题：
Current ratio and quick ratio are two of the most common ratios used to analyze a firm’s short－term or liquidity position.() 此题为判断题(对，错)。
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])}等价的关系表达式是( )。 A.Π3,4(R⋈S)B.Π2,3 (R⋈1=3S)C.Π3,4(σ1=1(R×S))D.Π3,4(R⋈1=1S)
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∩SB．T=R∪SC．T=R×SD．T=R/S
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. Pguaranteed that R’s profit share would not be less than $25,000 for the six months to 31 December 2004. The profitsharingarrangements after R’s admission were P 50%, Q 30%, R 20%. The profit for the year ended 31 December2004 is $240,000, accruing evenly over the year.What should P’s final profit share be for the year ended 31 December 2004?A $140,000B $139,000C $114,000D $139,375
设有如下关系表： R S T A B C A B C A B C 1 1 2 3 1 3 1 1 2 2 2 3 2 2 3 3 1 3 则下列操作中正确的是( )。A．T=R∩SB．T=RUSC．T=R×SD．T=R/S
Let R and S be the relation respectively: Relation R: A B C Relation S: B C D 1 2 3 2 3 4 6 7 8 2 3 5 The number of tuplesthat the result of the expression R ∞ S (Here is the natural join of relations R and S) isA．3B．4C．6D．9
设R和S都是二元关系，那么与元组演算表达式 {t| R(t)∧(u)(S(u)∧u[1]≠t[2])} 不等价的关系代数表达式是)______。A．π1,2(σ2≠3 (R×S))B．π1,2 (σ2≠1 (R×S))C．π1,2 (RS)D．π3,4(σ1≠4 (S×R))
设关系R和S都是二元关系，那么与元组表达式 {t|u)(|v)(R(u)∧S(v)∧u[1]=v[1]∧t[1]=v[1]∧t[2]=v[2])} 等价的关系代数表达式是______。A．π3,4 (R|S)B．π2,3 (R|S)C．π3,4 (R|S)D．π3,4 (σ1=1 (R×S))
给定关系R（A，B，C，D）和关系S（A，C，D，E，F），对其进行自然连接运算R∞S后的属性列为（ ）个；与σR.C＞S.F（R∞S）等价的关系代数表达式为（请作答此空）。A.σ3＞9（RxS）B.π1,2,3,4,8,9（σ1=5∧3=6∧4=7∧3>9（R×S））C.σ＇3＇＞＇9＇（R×S）D.1,2,3,4,8,9（σ1=5∧3=6∧4=7∧＇3＇＞＇9＇（R×S））
For the year just ended, N company had an earnings of$ 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.
分析下面的PASCAL程序，给出正确的运行结果（） PROGRAM mx（input，output）； VAR R，s，t：integer； PROCEDURE change（a，b：integer）； VAR T：integer； BEGIN A：=3*a； B：=2*b； T：=a+b； End； BEGIN R：=2；s：=4；t：=6； Change（r，s）； Writeln（‘r=’，r，’s=’，s，’t=’，t）End.A、r=2 s=4 t=6B、r=2 s=4 t=14C、r=6 s=8 t=6D、r=6 s=8 t=14
下列城市用地的类别代号组成中，哪几组有漏项或多项？（）A、R=R1+R2+R3+R4B、M=M1+M2+M3+M4C、T=T1+T2+T3+T4D、S=S1+S2+S3+s4E、G=G1+G2+G3+G4
问答题If there are only red, blue, and green marbles in a jar, what is the ratio of red to blue marbles? (1) The ratio of red to green marbles is 2:3. (2) The ratio of green to blue marbles is 6:5.
单选题分析下面的PASCAL程序，给出正确的运行结果（） PROGRAM mx（input，output）； VAR R，s，t：integer； PROCEDURE change（a，b：integer）； VAR T：integer； BEGIN A：=3*a； B：=2*b； T：=a+b； End； BEGIN R：=2；s：=4；t：=6； Change（r，s）； Writeln（‘r=’，r，’s=’，s，’t=’，t）End.Ar=2 s=4 t=6Br=2 s=4 t=14Cr=6 s=8 t=6Dr=6 s=8 t=14
单选题At a college basketball game, the ratio of the number of freshmen who attended to the number of juniors who attended is 3：4. The ratio of the number of juniors who attended to the number of seniors who attended is 5：6. What is the ratio of the number of freshmen to the number of seniors who attended the basketball game?A5：8B3：4C3：5D2：3E1：3
单选题Horizontal subdivision decks forming watertight compartments in the columns of a semisubmersible ship increase the unit’s（）.Atank capacitiesBstability in the event of damageCtowing speedDanchor holding ratio
单选题For a given fuel, a change in the compression ratio will affect the ignition lag by which of the listed means?（）AAn increase in compression ratio will increase the ignition lagBAn increase in compression ratio will decrease the ignition lagCA decrease in compression ratio will decrease the ignition lagDA decrease in ignition lag will increase the compression ratio
单选题What is the holding power ratio of an anchor? （）AMaximum mooring line tension divided by the anchor's weight in airBAnchor's weight in air divided by the maximum mooring line tensionCPreloading tension divided by the anchor's weight in airDOperating tension divided by the anchor's weight in air
单选题The ratio of the height of a vessel’s rudder to its width is referred to as the（）.Aaspect ratioBconstriction ratioCrudder ratioDsteering ratio
单选题If the ratio of the area of a sector to the area of the circle is 2：3. what is the ratio of the length of the arc in the sector to the circumference of the circle?A3/2B2/3C4/9D1/4E9/4
单选题In a class of 160 seniors, the ratio of boys to girls is 3 to 5. In the junior class, the ratio of boys to girls is 3 to 2. When the two classes are combined, the ratio of boys to girls is 1 to 1. How many students are in the junior class?A400B360C200D180E160
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?A1 to 3B1 to 6C2 to 9D3to10E4 to 5
多选题下列城市用地的类别代号组成中，哪几组有漏项或多项？（）AR=R1+R2+R3+R4BM=M1+M2+M3+M4CT=T1+T2+T3+T4DS=S1+S2+S3+s4EG=G1+G2+G3+G4