展开全部

题目列表

题目内容


This morning Tom visited 6 Internet sites, and Andrew visited 8 Internet sites. The table shows the time, in minutes, spent visiting each site.

Quantity A

The standard deviation of the 6 times shown for Tom

Quantity B

The standard deviation of the 8 times shown for Andrew


On a bookshelf, Pat arranges 7 different books: 2 history books, 3 philosophy books, and 2 science books. If Pat arranges the books so that the history books are next to each other, the science books are next to each other, and the philosophy books are next to each other, how many different arrangements 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.
Which of the following can be inferred about blues music from the passage?
Select the sentence in the passage that points to a reason why ethnographers have not reached agreement as to whether sixteenth-century feasts on Nias were challenge feasts.
The passage suggests which of the following about "diligent scribes"?
The primary purpose of the passage is to
Monumental changes taking place in the structures of world business match some equally ____________ changes taking place in the relations of international companies to the governments with which they deal.
The greatest_____________ true international free trade is public opinion: radical opposition to economic globalization at a grassroots level continues to grab headlines.
The priorities at astronomical observatories changed dramatically in the period, A major reason was the(i) _____________government funding for solar system research: the national government, eager to bolster the sense that the country was a supportive place for scientists, made a concerted effort to (ii)_____________studies of the moon, the planets, and near space.
Scientists are a generally _____________lot, but few can match in the depths of her perverse and unmerited obscurity the twentieth*century mathematical genius Amalie Noether.
Personal computers have become so _____________that the use of digital evidence collected from them is now a common part of many criminal and civil investigations.
Instead of flooding reporters with updates, the governor's press office dispenses information with the_____________ of an eyedropper.
Millville has its share of suburban eyesores -- cement-block strip malls, rows of fast-food restaurants,and_____________ split-level homes marching up hillsides denuded of trees.
Since it is an incredible challenge to detect dark matter directly, scientists have_____________ its existence from its gravitational effects on shaping galaxies and other large-scale structures.
The Chippewa regarded their treaties with the federal government as solemn covenants and therefore, throughout the twentieth century, met efforts by governmental officials to_____________those treaties with both open and hidden resistance.
$$20!-19!=?$$
A scientist conducted an experiment and collected three measurements. Each measurement was an integer. The range of the three measurements was 2 and the least value was 1. Which of the following values could be the average (arithmetic mean) of the measurements collected for the experiment?

Indicate all such values.
If the surface area of a cube is 96, what is its volume?

共收录:

25000 +道题目

269本备考书籍

最新提问