#### 题目列表

For how many of the 12 months shown did the long-term average water level decrease during the month by at least 20 billion gallons?

The time period during which the actual water level was lower than the drought warning water level was approximately what fraction of the one-year period shown?

A date is to be selected at random from the 12 dates labeled on the graph. Which of the following is closest to the probability that the actual water level for the date selected will be at least 40 billion gallons greater than the drought warning water level for that date?
In the xy-plane, the graph of an equation is symmetric with respect to the y-axis if for every point (a, b) on the graph, the point (-a, b) is also on the graph. Which of the following equations have a graph in the xy-plane that is symmetric with respect to the y-axis?

Indicate ALL such equations.
The repeating decimal $1.\overline{ab}$, where a and b are different digits, is equivalent to the fraction $\frac{n}{d}$, where n and d are positive integers whose greatest common factor is 1. What is the greatest possible value of n+d ?

The two triangles above are equilateral and PQ=15.

#### Quantity A

The sum of the perimeters of the two triangles

#### Quantity B

42

The product of three consecutive integers r, s, and t is 0, where r < s < t.

r

#### Quantity B

-1

Jerry ate $\frac{1}{5}$ of the cookies in a full jar of cookies, and Cantin ate $\frac{1}{6}$ of the remaining cookies in the jar.

#### Quantity A

The fraction of the cookies in the full jar that were not eaten by either Jerry or Cantin

#### Quantity B

$\frac{19}{30}$

Lines I and m are parallel and tangent to the circle. A rectangle (not shown) is inscribed in the circle.

#### Quantity A

The length of a diagonal of the rectangle

#### Quantity B

The distance between lines I and m

a < 0 < b < c

#### Quantity A

$\frac{ac}{b}$

ac

#### Quantity A

The greatest integer less than 100 that is the product of 3 different prime numbers

#### Quantity B

(2)(3)(13)

Michael opened two new savings accounts, S and T, at the beginning of a certain year and deposited a total of $5,000 in the two accounts. Account S earned simple annual interest at the rate of 4 percent, account T earned simple annual interest at the rate of 5 percent, and there were no other transactions in the two accounts that year. If the total amount of interest earned by the two accounts at the end of the year was$226, what was the amount that Michael deposited in account S?
An office building has 6 floors. If there are n offices on the top floor and each floor has 3 more offices than the floor just above it, how many offices are in the building?
What is the value of ($2^{236}$)($4^{-120}$)?

Over the period shown, which first-class postal rate was in effect for the longest period of time?
The ratio of the first-class postal rate in effect in June 1989 to the first-class postal rate in effect in June 1979 is
The greatest percent increase in the first-class postal rate over the previous rate listed occurred in

The table above shows the number of points scored by a team in each of 48 games. What is the 3rd quartile of the distribution of the data?
Which of the following is an equation of a line in the xy-plane that has a slope of 2 and that intersects the x-axis at x=3?

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