Find the domain of the function of two variables.f(x, y) = 
+ 
A. {(x, y)| y ? 0 and y ? -1}
B. {(x, y)| x ? 0 and y ? 1}
C. {(x, y)| x ? 0 and y ? 0 and y ? 1}
D. {(x, y)| y ? 0 and y ? 1}
Answer: D
Mathematics
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Suppose that a company can produce P(x, y) = 50
items using x units of labor and y units of capital. What is the productivity of capital when x = 10 and 
?
A. 100 B. 3000 C. 500 D. 2500 E. none of these
Mathematics
Evaluate the expression.
1/2
A. 
B. 
C. 
D. 
Mathematics
Find the root. 
A. -48.6 B. 3 C. -3 D. Not a real number
Mathematics
Solve the problem.Students at Maple School earned $210 selling candles. They want to make $2000 for a club trip. What percent of their goal has been reached?
A. 100% B. 10% C. 0.105% D. 10.5%
Mathematics