Without graphing the function, determine its amplitude or period as requested.y = 2 cos 
xFind the period.
A. 2
B. 
C. 
D. 6?
Answer: D
Mathematics
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Determine the size of matrix A and tell whether it is a square matrix, row matrix, column matrix, or none of these.A = 
A. 2 × 3; row matrix B. 3 × 2; row matrix C. 2 × 4; none of these D. 4 × 2; none of these
Mathematics
Find the expected value.A car agency has found daily demand to be as shown in the table.
Find the expected number of customers.
A. 9 B. 12 C. 10 D. 2
Mathematics
Use the demand equation to find the revenue function.x = f(p) = 55 - 7
A. R(p) = 55p - 49p3/2 B. R(p) = 55p - 7p C. R(p) = 55p - 7p2 D. R(p) = 55p - 7p3/2
Mathematics
Find the vertices of the ellipse.
+ 
= 1
A. (6, -3), (-6, -3)
B. (
, -3), (-
, -3)
C. (
, 0), (-
, 0)
D. (6, 0), (-6, 0)
Mathematics