#### 题目列表

For a sample of 210 households, one-third of the households do not have any pets, one-third of the households each have 1 pet, and the rest of the households each have 2 pets. Which of the following statistics for the sample are equal to 1? Indicate all such statistics.
According to a tax rate formula for a certain year, the amount of tax owed by an individual whose annual income was between $31,850 and$77,100 was equal to a base tax of $4,386 plus 24 percent of the annual income that exceeded$31,850. According to this formula, what was the amount of tax owed by an individual whose annual income that year was \$42,000?
Last Monday a certain store sold 17 wrenches at x dollars each. Last Tuesday the store reduced its prices and sold an additional 8 wrenches at 0.5x dollars each. Which of the following is equal to the average (arithmetic mean) price, in dollars, of the 25 wrenches that the store sold last Monday and Tuesday?
In a distribution of 8,500 different measurements of the variable x, 26.5 is the 56th percentile and 37.1 is the 78th percentile. Which of the following is closest to the number of measurements of x that are in the distribution such that 26.5 ≤ x ≤ 37.1 ?

The figure shows a smaller square with sides of length y inscribed in a larger square with sides of length x. Which of the following relationships between x, y, and z must be true ?
The functions f and g are defined by f (x) = |2x +1| and g(x)=3 for all numbers x. What is the least value of c for which f (c) = g (c)?
The area of a circular region is 5π

#### Quantity A

The diameter of the circular region

#### Quantity B

$\sqrt{20}$

The reciprocal of x - 2 is x +2.

x

3

x > 0

#### Quantity A

The area of a square region with diagonal of length $\sqrt{2}x$

#### Quantity B

The area of a circular region with diameter of length x

ABC is an equilateral triangle.

The length of AB

#### Quantity B

$2\sqrt{3}$

$\frac{1}{2}$ < r < 1

2r

#### Quantity B

$\frac{1}{r}$

In a data set of 10,000 numbers varying from 20 to 80, the number 62 is the 60th percentile and the number 74 is the nth percentile..

Quantity A: n
Quantity B: 70
A historian asserts that at the beginning of 1852, the population of a certain mining town was 16,000. The historian also asserts that for each of the years from 1849 through 1853, the towns population at the beginning of the year was twice that of the preceding year. According to the historian, what was the range of the towns populations at the beginning of each year from 1848 through 1853?
Line l in the xy-plane contains points A and B with coordinates (-4,5) and (6,-1), respectively. Line k is perpendicular to l and contains the midpoint of line segment AB. Which of the following statements are true?

Indicate all such statements.
If x < y, which of the following must be true?
A rectangular solid P has height 2c and a base of width a and length b. Two other rectangular solids, Q and R, each have height c and bases of width a and length b. Which of the following represents the amount by which the sum of the surface areas of Q and R exceeds the surface areas of P?
A survey of 550 male managers and 650 female managers was conducted. All 1,200 managers identified whether, for each of six characteristics, the characteristic is important to consider when hiring a new employee. For each of the six characteristics, the percent of managers surveyed who identified that characteristic as important to consider is given in the following table.
18.On his trip to the airport, Grant drove a total of 9 miles. His average speed on the trip was x miles per hour, where 30 ≤ x≤35. Which of the following could be the total number of minutes that Grant took to make the trip?
Indicate all such numbers of minutes.
If n is an integer, what is the least possible value of $3^{n}+(3)(3^{-n})$
At a certain elementary school, 10 percent of the fifth-grade students are members of the school band. If 12 percent of the fifth-grade boys and 8 percent of the fifth-grade girls are members of the band, what percent of the fifth-grade students at the school are boys?

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