Simplify. log b 
A. 
B. 7
C. 
D. 4
Answer: A
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = (4x - 2y)5
A. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
c ? 0
B. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: lines 
c ? 0
C. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: lines 
D. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
Solve.The area code for a phone number in a city can be either 813 or 218. The rest of the 7-digit phone number can be formed with the digits 0 through 9. How many phone numbers can the city have before it needs to have another area code?
A. 130,000 B. 20,000,000 C. 18,000 D. 1,000,000
Is the following correspondence a function?DomainRange 
A. function B. not a function
Complete the table of values and use it to solve the equation numerically.2x + 3 = 5 
A. 1 B. -2 C. 2 D. -1