Solve.The formula 
represents the number of households, N, in thousands, in a certain city that have a computer x years after 2006. According to the formula, in what year were there 81,000 households with computers in this city?
A. 2009
B. 2012
C. 2011
D. 2010
Answer: C
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Use the problem-solving strategy for applications of linear equations to solve the application problem.Tom Quig traveled 200 miles east of St. Louis. For most of the trip he averaged 70 mph, but for one period of time he was slowed to 10 mph due to a major accident. If the total time of travel was 8 hours, how many miles did he drive at the reduced speed?
A. 70 mi B. 80 mi C. 60 mi D. 55 mi
Use the Comparison Test to determine if the series converges or diverges.
A. converges B. diverges
Simplify completely.
A. 
B. 
C. 
D. 
Solve the problem.The concentration of alcohol in a person's blood is measurable. Suppose that the risk R (given as a percent) of having an accident while driving a car can be modeled by the equation R = 5ekxwhere x is the variable concentration of alcohol in the blood and k is a constant.Suppose that a concentration of alcohol in the blood of 0.07 results in a 10% risk 
of an accident. Find the constant k in the equation.Using this value of k, what is the risk if the concentration is 0.11?
What will be an ideal response?