Find the magnitude and direction angle (to the nearest tenth) for the given vector. Give the measure of the direction angle as an angle in [0, 360°).
A. 11; 342.5°
B. 
; 287.5°
C. 
; 342.5°
D. 11; 107.5°
Answer: C
Mathematics
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Solve the problem.The profit made when t units are sold, t > 0, is given by 
Determine the number of units to be sold in order for P < 0 (a loss is taken).
A. t > 0 B. t = 12 units or t = 17 units C. t < 12 units or t > 17 units D. 12 units < t < 17 units
Mathematics
Solve the equation.17.0 = - 14.5 - n
A. n = -2.5 B. n = -31.5 C. n = 31.5 D. n = 2.5
Mathematics
Decide whether the given matrix could be a probability vector. 
A. Yes B. No
Mathematics
Use the binomial theorem to expand and simplify the expression: 
a. 
b. 
c. 
d. 
Mathematics