The following graph shows the actual percentage of U.S. households with a computer as a function of household income (the data points) and a logistic model of these data (the curve). The logistic model is
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where x is the household income in thousands of dollars. For low incomes, the logistic model is approximately exponential. Which exponential model best approximates P(x) for small x? Round the coefficients to the nearest hundredth.
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A. 
B. ?
C. ?
D. ?
E. ?
Answer: D
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Solve the problem.The Family Fine Arts Center charges $22 per adult and $14 per senior citizen for its performances. On a recent weekend evening when 507 people paid admission, the total receipts were $8098. How many who paid were senior citizens?
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A. 
B. 
C. 
D. 
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