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The area of circular region $$C_1$$ is 4 times the area of circular region $$C_2$$.

Quantity A

The radius of $$C_1$$

Quantity B

Twice the radius of $$C_2$$


In nineteenth century Puerto Rico, the consumption of salted cod spread among the entire population; on the tables of humbler families it became ____________ food, adding flavor to other products and supplying much-needed protein.
It can be inferred from the passage that the "positive effect" occurs because
Six identical marbles are to be distributed among 4 cups numbered 1 through 4 so that in the resulting distribution there will be at least one marble in each cup. How many different distributions are possible?
Computational psychologists, since they take the operation of a computer as a model, ____________ concepts from computer science to explain what the mind is and how it works.
How many of the 900 positive 3-digit integers have a units digit of 2 and are the square of an integer?
The author mentions "other resources" primarily in order to
According to the passage, which of the following is true regarding the symbols of the Mesoamerican codex graphic system?
The standard deviation of $$n$$ numbers $$x_{1}$$, $$x_{2}$$, $$x_{3}$$,......, $$x_{n}$$, with mean $$\overline{x}$$ is equal to $$\sqrt{\frac{s}{n}}$$, where $$S$$ is the sum of the squared differences $$(x_{i} - \overline{x})^{2}$$ for $$1 \leq i \leq n$$.

For what value of $$x$$ is the standard deviation of the numbers $$6$$, $$14$$, $$16$$, and $$x$$ least?
Looking back on a project that they had approached with both great________ and considerable aspirations, they were amused to recognize that neither the fears nor the hopes had been at all realistic.
A box contains 30 marbles of which 6 are red, 7 are blue, 8 are yellow, and the rest are green. Marbles are selected randomly from the box one at a time without replacement. The selection process stops as soon as 2 marbles of different colors have been selected. What is the greatest number of selections that might be needed in order to stop the process?
$$0 \lt a \lt b \lt c$$

Quantity A

The standard deviation of the seven numbers $$-c, -b, -a, 0, a, b, c$$

Quantity B

The standard deviation of the seven numbers $$-c^{2}, -b^{2}, -a^{2}, 0, a^{2}, b^{2}, c^{2}$$




BC=DC

Quantity A

x

Quantity B

y


The advertised size of a television is the length of the diagonal of the rectangular viewing screen. For a television advertised as 42-inch, if the ratio of the lengths of the sides of the viewing screen is 16 to 9, approximately what is the area, in square inches, of the viewing screen?


Of the following, which is closest to the percent increase in the number of subscribers from quarter I to quarter Il of 1997?


The increase from quarter IV of 1997 to quarter l of 1998 in the total time that the subscribers spent on-line daily was approximately how many million minutes?


From quarter I of 1997 to quarter IV of 1998, the average (arithmetic mean) increase per quarter in the number of subscribers was approximately how many million?
Let $$k$$ be a positive integer, and let $$n$$ be a random variable whose values are the integers from 1 to $$k$$. The probability distribution of $$n$$ is defined by $$P(n)=\frac{2n-1}{d}$$, where $$d$$ is a constant.

Quantity A

$$d$$

Quantity B

$$k^2$$




A town library held a reading drive, in which 20 elementary school students were asked to record the number of books they read over the summer. Only whole numbers of books were recorded. The table above shows the results of the reading drive. The average (arithmetic mean) number of books read by the students was 2 books per student.

Which of the following statements individually provide(s) sufficient additional information to conclude that only one student read only 5 books?

Indicate all such statements.
A certain sign is in the shape of a regular octagon where the distance between any two opposite sides is 79 centimeters. Approximately what is the perimeter, in centimeters, of the sign?

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