Determine whether the positive or negative sign makes the equation correct.sin 220° = ±
A. Positive sign
B. Negative sign
Answer: B
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The following table shows the number C, in millions, of cars sold in the U.S. t years after 2005. Use the regression line for the data to estimate the number of cars sold in 2013. t 0 1 3 5 C 5.54 5.46 5.24 4.54? ?
A. 3.70 million B. 4.92 million C. 3.16 million D. 4.11 million
Solve.1.38x - 3.46 = 3.21x - 8.584
A. 0.29 B. 2.8 C. 3.8 D. 0.28
Transform the polar equation to an equation in rectangular coordinates. Then identify and graph the equation.r sec ? = -6
A. 
x = -6; vertical line 6 units
to the left of the pole
B. 
y = -6; horizontal line 6 units
below the pole
C. 
(x + 3)2 + y2 = 9; circle, radius 3
center (-3, 0) in rectangular coordinates
D. 
x2 + (y + 3)2 = 9; circle, radius 3,
center at (0, -3) in rectangular coordinates
Solve the problem.The population of a small town in 1988 was 12,000 people. Due to decline in industrial growth the population has since been decreasing at a rate of 3% every year. What was the population of this town in 1998?
A. 7978 people B. 7185 people C. 9805 people D. 8849 people