If s denotes the length of the arc of a circle of radius r subtended by a central angle ?, find the missing quantity.r = 
feet, s = 16 feet, ? = ?
A. 
radians
B. 40 radians
C. 40°
D. 
°
Answer: B
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Decide whether the equation is "conditional," an "identity," or a "contradiction." Give its solution set.2[3 - (5 - 5r)] - r = -10 + 3(2 + 3r)
A. Identity; {all real numbers} B. Conditional; {10} C. Conditional; {-5} D. Contradiction; ?
Find all solutions of the equation in the interval [0°, 360°).2 sin2 ? - 3 sin ? - 2 = 0
A. {90°, 150°, 210°} B. {210°, 330°} C. {240°, 300°} D. {90°, 210°, 330°}
List the critical values of the related function. Then solve the inequality.
? 
A. -4, -3, 3, 24; (-?, -4) ? (-3, 3) ? [24, ?) B. -4, -3, 3, 24; (-4, -3) ? (3, 24] C. -3, 3, 24; (-?, -3) ? (3, 24] D. 24; [24, ?)
To solve this system using a matrix equation, which of the following matrices would be multiplied by the column matrix of the constants to solve for the variables?
?
? ?
A. ?
B. 
C. 
D. 
E. 