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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?
For which of the following values of $$x$$ is the units digit of the product $$(2)(3^{x})$$ equal to $$4$$?


In a survey, 130 people were asked how many movies they had seen in the preceding year. Their responses varied from 0 to 30 movies. The graphs above show two different summaries of the same survey results. How many people responded that they had seen 11 or 12 movies?
The units digit of a positive integer $$n$$ is 8

Quantity A

The units digit of $$3n$$

Quantity B

The units digit of $$n^{3}$$


If $$0 \lt r \lt t$$ and $$r=50-t$$, then what is the greatest possible value of the median of $$r$$, $$t$$, and $$28$$?
Each employee in two separate groups of 15 employees, group I and group II, was given a job-performance rating. The standard deviation of the ratings for group I was 8.5 and the standard deviation for group II was also 8.5.

Quantity A

The standard deviation of the 30 ratingss

Quantity B

17


In a sample of $$n$$ people, 80 percent of the people filled out a questionnaire. If 65 percent of those who filled out the questionnaire are college graduates, what is the greatest possible percent of college graduates in the sample of $$n$$ people?
A set consists of $$k$$ consecutive integers, including $$2$$. The sum of the integers in the set is $$-11$$.

Quantity A

$$k$$

Quantity B

$$10$$


If $$T=4n^{2}+3$$ and $$n$$ is an integer, which of the following could be the units digit of $$T$$?

Indicate all such digits.

If $$y=\frac{x+w}{2}$$ , what is $$w-y$$ in terms of $$x$$ and $$y$$?


PQ=QR

The area of the shaded triangular region is $$\frac{1}{3}$$ the area of triangular region PQR.

Quantity A

$$\frac{1}{3}$$(PR)

Quantity B

PS


1 < x < 2

Quantity A

$$\frac{1}{x}$$+$$\frac{2}{x}$$+ $$\frac{3}{x}$$

Quantity B

x +$$\frac{x}{2}$$+ $$\frac{x}{3}$$


$$x \lt y$$

The median of $$x$$, $$y$$ and $$120$$ is $$100$$

Quantity A

$$x$$

Quantity B

$$90$$


The average (arithmetic mean) of a set of 10 positive integers is 7.5.

Quantity A

The probability that the value of one randomly chosen integer from the set will be greater than 7

Quantity B

$$\frac{1}{2}$$


Quantity A

The number of positive factors of 97

Quantity B

The number of positive factors of 87


Vladimir invested $10,000 for one year.He invested some of the amount at 4 percent simple annual interest and the rest of the amount at 6 percent simple annual interest.

If the total interest earned for the year was between $450 and $550, which of the following statements must be true?.

Indicate all such statements.
List D: $$(-\frac{1}{2})^{2}$$, $$(-\frac{1}{2})^{-2}$$, $$(-\frac{1}{3})^{2}$$, $$(-\frac{1}{3})^{-2}$$

What is the range of the numbers in list D?
How many integers from 1 to 2,000, inclusive, are both the square of an integer and the cube of an integer?
All of the 80 science students at a certain school are enrolled in at least one of three science courses: biology, chemistry, and physics. There are 60 students enrolled in biology, 50 students enrolled in chemistry, and 35 students enrolled in physics. None of the students are enrolled in all three courses. Which of the following could be the number of students enrolled in both chemistry and physics?
Indicate all such numbers.

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