Solve the problem.If the rectangle below is a golden rectangle(with 2x as the shorter side), then the approximate value of x is
A. 144.
B. 161.8.
C. 72.
D. 116.5.
E. none of these
Answer: C
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Find the magnitude.Let u = 
. Find the magnitude (length) of the vector: 5u.
A. 5
B. -5
C. 5
D. 
Find the indicated root and express the answer in standard form.Fourth roots of -16
A. 2 + i, 2 - i, -2 + i, -2 - i
B. 8
+ 8i
, 8
- 8i
, -8
+ 8i
, -8
- 8i
C. 1 + i, 1 - i, -1 + i, -1 - i
D. 
+ i
, 
- i
, - 
+ i
, - 
- i
Solve the problem.Alicia sold $6,699 of paintings at the art fair. If she sold 7 paintings total, and they all sold for the same amount, what was the price of one painting?
A. $951 B. $957 C. $857 D. $994
For the given equation, state whether the directrix is vertical or horizontal and give its location in relation to the pole.r = 
A. Horizontal, 5 units above the pole
B. Horizontal, 5 units below the pole
C. Horizontal, 
units above the pole
D. Horizontal, 
units below the pole