Find the reference angle for the given angle.26°
A. 116°
B. 26°
C. 64°
D. 154°
Answer: B
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Solve the problem.Find the area of the rectangle by multiplying the length and the width of the large rectangle using the FOIL method.
A. 4x2 + 16x +12 B. 4x2 + 19x + 12 C. 4x2 +19x D. 4x2 + 3x + 12
Convert the given polar coordinates of the point to rectangular coordinates.(9, 210°)
A. 
B. 
C. 
D. 
Solve the variation problem.The intensity of a radio signal from a radio station varies inversely as the square of the distance from the station. If the intensity is 8000 units at a distance of 2 miles, what will it be at a distance of 6 miles? Round to the nearest unit.
A. 915 units B. 853 units C. 889 units D. 872 units
Solve the problem.Suppose, for a certain drug, the following results were obtained: Immediately after the drug was administered, the concentration was 10 milligrams per milliliter. Eleven hours later, the concentration had dropped to 2.1 milligrams per milliliter. The concentration decays exponentially according to the law 
Determine the value of k for this drug.
A. k = -0.1419 B. k = 0.1419 C. k = -0.8161 D. k = -0.0067