Solve the problem.The area A = ?r2 of a circular oil spill changes with the radius. At what rate does the area change with respect to the radius when 
A. 81? ft2/ft
B. 9? ft2/ft
C. 18 ft2/ft
D. 18? ft2/ft
Answer: D
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Solve the inequality and graph. Express your answer in interval notation.-29 ? -4x - 1 ? -13
A. (-7, -3)
B. [3, 7]
C. [-7, -3]
D. (3, 7)
Add or subtract the complex numbers7i + (-5 - i)
A. 5 - 6i B. -5 + 8i C. 5 - 8i D. -5 + 6i
Solve the problem.The number of traffic accidents has been decreasing in a certain county each year. The data is shown in the table for several recent years. The set of data can be approximated with a linear equation.
Find an equation of a model to describe the data. Predict when there will be less than 300 accidents per year.
A. after 2033 B. after 2029 C. after 2018 D. after 2020
Solve the problem. Give an exact answer and an approximation to the nearest tenth.The diagram below shows the side view of a plan for a slanted roof. Find the unknown length in this roof plan.
A. 
ft ? 4.7 ft
B. 
ft ? 18.4 ft
C. 
ft = 170.0 ft
D. 
ft ? 5.8 ft