Determine the size of matrix A and tell whether it is a square matrix, row matrix, column matrix, or none of these.A = 
A. 20; row matrix
B. 5 × 4; none of these
C. 4 × 5; none of these
D. 4 × 4; square matrix
Answer: C
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Solve.You just started a new job and received a $5,500 bonus. You decide to invest this money so that you can purchase a new car in five years. Your local credit union offers a CD paying 5% annual interest compounded semiannually. How much money will you have at the end of five years?
A. $8,958.92 B. $7,040.46 C. $6,222.75 D. $6,701.22
Solve the problem using matrices.Melody has $45,000 to invest and wishes to receive an annual income of $4290 from this money. She has chosen investments that pay 5%, 8%, and 12% simple interest. Melody wants to have the amount invested at 12% to be double the amount invested at 8%. How much should she invest at each rate?
What will be an ideal response?
Graph the ellipse and locate the foci.9x2 + 4y2 = 36
A. foci at (2
, 0) and (-2
, 0)
B. foci at (0, 
) and (0, -
)
C. foci at (
, 0) and (-
, 0)
D. foci at (
, 0) and (-
, 0)
Use the definition of equality of complex numbers to find the real numbers x and y such that the equation is true.x - 2i = 5 + yi
A. x = 5, y = -2 B. x = -5, y = 7 C. x = 5, y = 2 D. x = -5, y = -3