#### 题目列表

For 1988, the typical travel time during the morning cormmuting hours was approximately what fraction of the typical travel time during the evening commuting hours?
The typical travel time during the morning commuting hours decreased by approximately what percent from 1986 to 1988?
During the morning commuting hours in 1987, what was the average speed, in miles per hour, of a car that traveled the 10 miles on Road H if the car took the typical amount of time to travel the 10 miles?
A certain box contains 4 red blocks, 5 blue blocks, and 3 yellow blocks. Judy will select one of these blocks at random from the box, put it back in the box, and then again select a block at random from the box. What is the probability that both of the blocks selected will be yellow?
The legs of aright triangle are in the ratio of 3 to 1. If the length of the hypotenuse of the triangle is $\sqrt{40}$, then the perimeter of the triangle is between.
A certain class of 90 students took a typing proficiency test. The average (arithmetic mean) score of the students who passed the test was 84, and the average score of the students who failed the test was 60. If the average score of all students was 80, how many students passed the test?
Which of the following equals $8*(72)^{-5}$?
In the xy -plane, line l is parallel to the line y = 3x + 2. If line l passes through the point (1, -1), then line e passes through which of the following points?
Indicate all such points.

The center of the circleis O,and RS'= ST= 4. What is the lengthof arc RWT?
How many values of x are there such that x is an integer and |3x- 2| < 8?

The figure shows the design of a mosaic tile in which the four sides of the square are the diameters of four intersecting semicircles. Small blue stones are to be placed in the shaded regions and will cover 95 percent of the area of these regions. If each side of the square has length 2 feet, approximately how many square feet of the tile will be covered by the blue stones?
A research report states that the average (arithrmetic mean) of 120 measurements was 72.5, the greatest of the 120 measurements was 92.8, and the range of the 120 measurements was 51.6.
The information given above is sufficient to determine the value of which of the following statistics?
Indicate all such statistics.
Amy and Jed are armong the 35 people, who are standing in a line, one behind the other, waiting to buy movie tickets. The number of people in front of Amy plus the number of people behind Jed is 24. If there are 15 people behind Amy, including Jed, how many people are in front of Jed?
The functions f and g are definedby f(x)= |2x + 1| and g(x)= 3 for all numbers x. What is the least valueof c for which f(c) = g(c) ?

#### Quantity A

The greatest possible value of 3/(x-y) ,where 6≤x≤8 and 0≤y≤5

#### Quantity B

3

By approximately how many square miles did the area of the United States increase from 1800 to 1900?
In the xy-plane, the points P, Q, and S have coordinates (14, 10), (1, 0), and (6, 0), respectively. What is the area of triangular region PQS ?
A farmily paid 12 percent of its annual after-tax income on food last year. This amount was equal to 10 percent of its annual before-tax income last year. Which of the following is closest to the percent of the family's annual before-tax income that was paid for taxes last year?
If 2,4, 6, and 9 are the digits of two 2-digit integers, what is the least possible positive difference between the integers?

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