Solve the quadratic equation using the quadratic formula.x2 + 18x + 67 = 0
A. {9 + 
}
B. {-9 - 
, -9 + 
}
C. {-18 + 
}
D. {9 - 
, 9 + 
}
Answer: B
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Solve the problem.A company adopts an advertising campaign to weekly add to its customer base. It assumes that as an average fifty percent of its new customers, those added the previous week, will bring in one friend, but those who have been customers longer will not be very effective as recruiters and can be discounted. A media campaign brings in 10,000 customers initially. What is the expected total number of customers with whom the company can expect to have dealings?
A. 20,000 customers B. The sum diverges to infinity. C. 15,000 customers D. 30,000 customers
Find the derivative of y with respect to x, t, or ?, as appropriate.y = ln 2x2
A. 
B. 
C. 
D. 
Find an equation of the tangent to the curve at the point corresponding to the given value of the parameter.
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Evaluate.log21
A. 2 B. 0 C. 1 D. -1