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In many branches of science, our knowledge and technology have advanced so rapidly that new studies carried out with improved instruments and techniques may well ____________ research done just twenty years earlier.
Which of the following most logically completes the argument?
A catalog company had a special sale that offered a discount of $25 off each $75 in merchandise ordered. A shipping charge of 10 percent was calculated before the discount was taken, and sales tax of 5 percent was calculated after the discount was taken. If Jason ordered $300 in merchandise and no tax was calculated on shipping charges, what was the total charge for Jason's order?
A dealer's gross profit on the sale of a car is defined as the selling price of the car minus its cost to the dealer. A car dealer sold $$n$$ cars for $$s$$ dollars each. If the dealer's total gross profit was $$p$ dollars, what was the dealer's average (arithmetic mean) cost per car, in dollars?
What percent of all the presidents and vice presidents are less than 50 years old?
Two organizations will be selected at random, one at a time and without replacement, from the 30 organizations. Approximately what is the probability that the age of the vice president of at least one of the two organizations will be at least 1 year greater than the age of the corresponding president?
For how many of the organizations does the age of the president exceed the age of the corresponding vice president by 15 years?
This book indulges in a number of convenient ____________, including its dubious timeline and its veneer of collective authorship.
Which of the following is the graph of all the values of x such that |2x-1| ≤ 7?

The area of a circular region with radius r is 5π

Quantity A

The area of a circular region with radius 3r

Quantity B

45π






Integers x and y are each greater than 1, and 7 < xy < 13. How many different values of xy are possible?
In a quality control study, 200 boxes of brackets were examined; each box contained 50 brackets. For each box, the ratio, f, of the number of defective brackets in the box to the total number of brackets in the box was recorded. The number of defectives per box varied from 1 to 12, inclusive.

Quantity A

The sum of the 200 values of f

Quantity B

The sum of the squares of the 200 values of f


The electric power P in a resistor is directly proportional to the square of the electric current I flowing through the resistor. For a given resistor, if the power is 18 watts when the current is 3 amperes, what is the power, in watts, when the current is 4 amperes?
In order to determine the scores for the players, each word listed with 3 or 4 letters was given 1 point, each word listed with 5 or 6 letters was given 2 points, and each word listed with 7 letters was given 3 points. The score for each player was the sum of the points given for the words that the player listed. What was the absolute value of the difference between the score for Player A and the Score for Player B?

_____point(s)
Of the 3-letter words listed by Player A or Player B, 4 words were listed by both players. How many of the 3-letter words listed were listed by only one of the two players?
What is the average (arithmetic mean) number of letters per word in the words listed by Player B?
In a club composed of 30 members, $$\frac{2}{5}$$ of the members are older than 24 years and $$\frac{5}{6}$$ of the members are right-handed.

Quantity A

The number of members in the club who are older than 24 years and right-handed

Quantity B

10




The episodes encountered in dreams tend to be quite (i)____________. Yet in this respect dreams' content differs from their causes, for dreams are as likely to have been molded by (ii)_________ events as by extreme and life-changing ones.
On the first day of a sale, a storekeeper sold $$\frac{3}{5}$$ of the goods in the initial inventory. On the second day of the sale, the storekeeper sold $$\frac{1}{4}$$ of the goods that remained at the end of the first day of the sale.

Quantity A

The fraction of the goods in the initial inventory that remained at the end of the second day of the sale

Quantity B

$$\frac{3}{10}$$






If the annual commercial energy usage for lighting is w units of energy, which of the following is closest to the annual commercial energy usage for refrigeration, in the same units of energy?

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