Write the expression as a complex number in the form a + bi.
A. 2 - 
i
B. 2 - 
i
C. 2 - 
D. 2 - 2
i
Answer: A
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Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = 
A. ? B. 0 C. 1 D. No limit
Solve the system using matrices. x + y + z = -2 x - y + 3z = -42x + y + z = 1
A. No solution B. (-3, 3, -2) C. (3, -2, -3) D. (-3, -2, 3)
Find the eccentricity of the hyperbola.Find the eccentricity of a hyperbola centered at the origin having a focus of 
and corresponding directrix 
A. 
B. 
C. 
D. 
Solve the problem.If P dollars is invested in an account at an annual interest rate of r, with interest compounded annually, after 2 years the amount A in the account is given by A = P(1 + r)2. Use this formula to determine the interest rate if $2000 grows to $2464 in 2 years, with interest compounded annually.
A. 11% B. 1.11% C. 1.23% D. 0.11%