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Executives and federal officials say that the use of crack and cocaine is growing rapidly among workers, significantly compounding the effects of drug and alcohol abuse, which already are a cost to business of more than $100 billion a year.
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In 1982 the median income for married-couple families with a wage-earning wife was $9,000 more than a family where the husband only was employed.
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In 1791 Robert Carter III, one of the wealthiest plantation owners in Virginia, stunned his family, friends, and neighbors by filing a deed of emancipation, setting free the more than 500 slaves who were legally considered his property.
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A number of linguists contend that all of the thousands of languages spoken by the world's five billion people can be traced back to a common root language.
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At Shiprock, New Mexico, a perennially powerful girls' high school basketball team has become a path to college for some and a source of pride for a community where the household incomes of 49 percent of them are below the poverty level.
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Quasars are so distant that their light has taken billions of years to reach the Earth; consequently, we see them as they were during the formation of the universe.
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Teratomas are unusual forms of cancer because they are composed of tissues such as tooth and bone not normally found in the organ in which the tumor appears.
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Pablo Picasso, the late Spanish painter, credited African art with having had a strong influence on his work.
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OG12 OG15 OG16
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When a player in a certain game tossed a coin a number of times, 4 more heads than tails resulted. Heads or tails resulted each time the player tossed the coin. How many times did heads result?(1)The player tossed the coin 24 times.(2)The player received 3 points each time heads resulted and 1 point each time tails resulted, for a total of 52 points.
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If n and k are greater than zero, is$$\frac n k$$ an integer(1)n and k are both integers.(2)$${n}^{2}$$ and $${k}^{2}$$ are both integers.
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Is |x| =y-z?(1)x+y=z(2)x < 0
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OG12 OG15 OG16
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 In the figure above, what is the value of x + y ?(1)x = 70(2)△ABC and △ADC are both isosceles triangles.
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PREP07 Test 2
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Whenever Martin has a restaurant bill with an amount between $10 and $99, he calculates the dollar amount of the tip as 2 times the tens digit of the amount of his bill. If the amount of Martin's most recent restaurant bill was between $10 and $99, was the tip calculated by Martin on this bill greater than 15 percent of the amount of the bill?(1)The amount of the bill was between $15 and $50.(2)The tip calculated by Martin was $8.
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Is k greater than t?(1)$$kt = 24$$(2)$${k}^{2} >{t}^{2}$$
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OG12 OG15
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If Sara's age is exactly twice Bill's age, what is Sara's age?(1)Four years ago, Sara's age was exactly 3 times Bill's age.(2)Eight years from now, Sara's age will be exactly 1.5 times Bill's age.
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 In the figure above,what is the ratio $$\frac{KN}{MN}$$?(1)The perimeter of rectangle $$KLMN$$ is 30 meters(2)The tfree small rectangles have the same dimensions
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PREP07 Test 1
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If r and s are positive integers, is $$\frac{r}{s}$$ an integer?(1)Every factor of s is also a factor of r.(2)Every prime factor of s is also a prime factor of r.
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OG12 OG15
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$${S}=\frac{\frac{2}{n}}{\frac{1}{x}+\frac{2}{3x}}$$In the expression above, if $${x}{n}≠{0}$$, what is the value of S?(1)x = 2n(2)$$n =\frac{1}{2}$$
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OG12 OG15
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If n is a positive integer, is the value of b - a at least twice the value of $${3}^{n}-{2}^{n}$$ ?(1)$$a ={2}^{n+1}$$ and $$b={3}^{n+1}$$(2)$$n = 3$$
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OG12 OG15 OG16
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Every member of a certain club volunteers to contribute equally to the purchase of a $60 gift certificate. How many members does the club have?(1)Each member's contribution is to be $4.(2)If 5 club members fail to contribute, the share of each contributing member will increase by $2.
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