Solve using Cramer's rule, if possible. If it is not possible, state whether the system is inconsistent or has infinitely many solutions.
A. (7, 1)
B. (1, 7)
C. (-7, -1)
D. (-1, 7)
Answer: A
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Solve the equation.2x - 1 = 0
A. 
B. 
C. 
D. 
Express as a single logarithm and, if possible, simplify.log a 
- log a 
A. log a 
B. log a 
C. log a 
D. log a 
Provide an appropriate response.Suppose that you can invest $8000 in a business that guarantees you the following cash flows: $4000 at the end of 2 years, $3500 at the end of 4 years, and $2000 at the end of 7 years. Use a graphing calculator to graph the net present value as a function of the interest rate compounded annually. Determine the interest rates for which the investment is profitable.
Fill in the blank(s) with the appropriate word(s).
Solve the problem.The logistic growth model 
represents the proportion of the total market of a new product as it penetrates the market t years after introduction. When will the product have 65% of the market?
A. 3.31 years B. 3.03 years C. 2.03 years D. 4.31 years