Find the modulus of the number.8 - 4i
A. 80
B. 4
C. 2
D. 12
Answer: B
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Determine whether the argument is valid or invalid.All women are wealthy. Amanda is a woman. Therefore, Amanda is wealthy.
A. Invalid B. Valid
Solve the problem.A real estate agent agrees to sell an office building according to the following commission schedule: $27,000 plus 20% of the selling price in excess of $800,000. Assuming that the office building will sell at some price between $800,000 and $1,200,000, inclusive, over what range does the agent's commission vary?
A. The commission will vary between $27,000 and $257,000, inclusive. B. The commission will vary between $28,000 and$107,000, inclusive. C. The commission will vary between $27,000 and $107,000, inclusive. D. The commission will vary between $187,000 and $267,000, inclusive.
Solve the problem.The value of a certain make and model of used car can depend on several factors. The table gives data for the values of three Chevy Caprice station wagons. The value V is measured in dollars, where A is the age of the car in years, and C is the condition of the car rated on a scale of 1 to 10 (10 is excellent condition).
The variables are found to be related by the equation 
Use the information given in the table to write a matrix equation which when solved will yield the values of a, b, and c. Then, using the fact that the inverse of the
matrix 
is 
, find a.
A. a = 14,655
B. a = 15,600
C. a = 15,850
D. a = 14,900
The graph of a piecewise-defined function is given. Write a definition for the function. 
A. 
B. 
C. 
D. 