Write the complex number in trigonometric form r(cos ? + i sin ?), with ? in the interval [0°, 360°).-
- i
A. 
(cos 315° + i sin 315°)
B. 
(cos 225° + i sin 225°)
C. 
(cos 135° + i sin 135°)
D. 
(cos 45° + i sin 45°)
Answer: B
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The function M(x) = 0.56x – 37 models the relationship between the number of potato chip bags x that a certain vendor produces and the profit. Find M(2,000), the profit that the vendor makes from selling 2,000 bags of potato chips.
a. $1,705 b. $1,083 c. $1,593 d. $1,920
Simplify the expression.7a + 11 + 7a
A. 14a + 11 B. 28a C. 49a + 11 D. 14a
Solve the problem.Using a phone card to make a long distance call costs a flat fee of $0.69 plus $0.28 per minute starting with the first minute. What is an equation of the form 
for this situation?
A. y = 0.28x B. y = 0.69x + 0.28 C. y = 0.69x D. y = 0.28x + 0.69
Solve the inequality. Write the solution set in interval notation.
t - 
t > t - 
A. 
B. (0, ?)
C. 
D. (-5, ?)