展开全部

题目列表

题目内容


0 < $$x$$ < 90

Quantity A

$$y$$

Quantity B

5


Which of the following is a value of $$x$$ for which $$x^{12}-x^{10}+x^8-x^6 \gt 0?$$

Quantity A

The median of the 115 scores

Quantity B

76


For all integers $$k \gt 1$$, $$P_{k}=\frac{k+1}{k}$$. For all integers $$k \gt 2$$, $$b_{k}=P_{k}-P_{k-1}$$. The integer $$n$$ is greater than $$2$$.

Quantity A

$$b_{n}$$

Quantity B

$$\frac{-1}{n^2-n}$$


Two water faucets are used to fill a certain tank. Running individually at their respective constant rates, these faucets fill the empty tank in 12 minutes and 20 minutes, respectively. If no water leaves the tank, how many minutes will it take for both faucets running simultaneously at their respective rates to fill the empty tank?
Passwords for a certain computer consist of 5 symbols typed on a computer keyboard. Each password consists of one @ symbol, two # symbols, and two $ symbols, typed in any order. For example, @#$$# and $#$#@ are two different passwords for the computer.

Quantity A

The total number of different passwords for the computer

Quantity B

30


How many ways can the integers 3, 4, 6, 7, and 8 be arranged using each digit only once to form a five-digit integer such that the middle digit is odd?
Four toys—a stuffed animal, a ball, a toy car, and a doll—are to be distributed among three children—Jasmine, Katey, and Leah. If the toys are to be distributed in such a way that each child receives at least one toy, how many such distributions are possible?
Working simultaneously at their respective constant rates, pump $$P$$ and pump $$S$$ together pumped out $$\frac{2}{3}$$ of the water in a full tank in 1 hour 20 minutes. Pump $$P$$ then stopped working, and pump $$S$$, working alone at its constant rate, pumped out the rest of the water in the tank in 50 minutes. How many hours would it have taken pump $$P$$, working alone at its constant rate, to pump out all the water in the full tank?
A furniture store purchased sofas for a wholesale price of $400 each and sold most of them for a retail price of $560 each. In a summer sale, the retail price of the last few sofas was reduced by $$x$$ dollars, and they were sold at this reduced price. The store's profit from selling the last sofa was more than 15 percent of its wholesale price. Which of the following could be the value of $$ x$$ ?

Indicate all such values.
A rectangular plastic box with inside dimensions 6 inches by 5 inches by 4 inches is 85 percent full of water and contains nothing else.Several spherical lead balls with radius 1 inch will be placed in the water until the box is at least 90 percent full but less than 95 percent full. How many of these lead balls will be placed in the water? (Note: The volume of a sphere of radius r is $$\frac{4πr^3}{3}$$.)
What is the units digit of the product $$(11^{10})(12^5)(13^3)(15)$$?
For how many of the categories shown was the dollar amount of the expenditures in 1995 less than $1 billion?
Approximately what was the ratio of the dollar amount of the expenditures for prescriptions in 1995 to the dollar amount of the expenditures for prescriptions in 1970?
From 1970 to 1995, the dollar amount of expenditures for nursing home care increased by approximately what percent?
$$x$$ is a positive even integer.

Quantity A

The units digit of $$5x^3$$

Quantity B

2


Consider the numbers $$q$$, $$r$$, and $$s$$, where $$0 \lt q \lt r \lt 1 \lt s$$. Which of the following shows the five numbers $$r-q$$, $$\sqrt{r-q}$$, $$\sqrt{s+q}$$, $$(r-q)^{2}$$, and $$(s+r)^{2}$$ listed in order from least to greatest?
A gardener plans to cover a rectangular plot of land with pine bark mulch to a depth of 4 inches.The plot measures 8 feet by 12 feet, and the gardener will buy mulch packed in bags. If each bag contains 3.5 cubic feet of mulch and costs $6,what is the cost of the least number of bags that the gardener will need to cover the plot? (Note: 1 foot=12 inches.)
Of the following, which is closest to $$\frac{(5.971)(10^{16})}{0.0602}$$?
$325, $418, $722, $818, $955, $1,092

The six amounts listed are the reported commissions eamed by 6 salespeople during April. Two of the reported amounts are in error; one is $120 greater than the actual amount and one is $120 less.

Quantity A

The standard deviation of the six reported commissions

Quantity B

The standard deviation of the six actual commissions


共收录:

25000 +道题目

236本备考书籍

最新提问