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PREP07 Test 1	In some species of cricket, the number of chirps per minute used by the male for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve as an approximate thermometer.
PREP07 Test 1	Industrialization and modern methods of insect control have improved the standard of living around the globe while at the same time they have introduced some 100,000 dangerous chemical pollutants, having gone virtually unregulated since they were developed more than 50 years ago.
PREP07 Test 1	Is $$ \sqrt{\left (x-3\right) ^2} =3-x$$ (1)$$ x\neq 3$$ (2) –x \|x\| >0
PREP07 Test 1	If $$\frac{x}{y}=\frac{2}{3}, then \frac{(x-y)}{x}=$$
PREP07 Test 1	If x is a negative integer, which of the following expressions has the LEAST value?
PREP07 Test 1	What is the value of $$5x^2 + 4x - 1$$ ?(1) x(x + 2) = 0(2) x = 0
PREP07 Test 1	A decade after initiating the nation's most comprehensive and aggressive antismoking program, per capita consumption of cigarettes in California declined from over 125 packs annually per person to about 60, a drop more than twice as great as in the nation as a whole.
PREP07 Test 1	If m > 0 and n > 0, is $${(m+x)\over(n+x)}>\frac{m}{n}$$ ?(1) m < n(2) x > 0
PREP07 Test 1	I. 72, 73, 74, 75, 76II. 74, 74, 74, 74, 74III. 62, 74, 74, 74, 89The data sets I, II, and III above are ordered from greatest standard deviation to least standard deviation in which of the following?
PREP07 Test 1 PREP2012	A study of food resources in the North Pacific between 1989 and 1996 revealed that creatures of the seabed were suffering from dwindling food supplies, possibly resulting from increasing sea surface temperatures during the same period.
PREP07 Test 1	In the rectangular coordinate system shown above, does the line k (not shown) intersect quadrant II?(1) The slope of k is -1/6(2) The y-intercept of k is -6.
PREP07 Test 1	At a constant rate of flow, it takes 20 minutes to fill a swimming pool if a large hose is used and 30 minutes if a small hose is used. At these constant rates, how many minutes will it take to fill the pool when both hoses are used simultaneously?
PREP07 Test 1	To help counteract the adverse effects of trout stocking on the amphibian populations in certain mountain lakes, biologists are recommending cutting back on trout stocking on the part of some states and even their being removed from some popular fishing lakes.
PREP07 Test 1	If the sum of three different numbers is 54, what is the largest number?(1) The largest number is twice the smallest number.(2) The sum of the two smaller numbers is 30.
PREP07 Test 1	If xy + z = x(y + z), which of the following must be true?
PREP07 Test 1	Many environmentalists, and some economists, say that free trade encourages industry to relocate to countries with ineffective or poorly enforced antipollution laws, mostly in the developing world, and that, in order to maintain competitiveness, rich nations have joined this downward slide toward more lax attitudes about pollution.
PREP07 Test 1	If M is a finite set of negative integers, is the total number of integers in M an odd number?(1) The product of all the integers in M is odd. (2) The product of all the integers in M is negative.
PREP07 Test 1	If -3 is 6 more than x, what is the value of $$\frac{x}{3}$$
PREP07 Test 1	Recent breakthroughs in technology have made it possible that high-definition digital video cameras are able to capture material with a degree of fidelity that nearly compares to 35-millimeter film and to project it digitally in theaters with no resulting loss of image quality.
PREP07 Test 1	A certain bag contains red, blue, and green marbles. What is the ratio of the number of green marbles to the number of red marbles in the bag?(1)The number of blue marbles in the bag is 2 times the number of green marbles in the bag.(2)The number of blue marbles in the bag is 3 times the number of red marbles in the bag.