Given a = 12, b = 14, and c = 7, use the Law of Cosines to solve the triangle for the value of A. Round your answer to two decimal places.
?
A. 80.44°
B. 91.02°
C. 58.98°
D. 29.99°
E. 60.33°
Answer: C
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The polar equation of a circle is given. Give polar coordinates for the center of the circle and identify its radius.r = -10 cos ?
A. C(-5, 0), radius = 5
B. C(-10, 0), radius = 10
C. C
, radius = 5
D. C
, radius = 10
Solve the problem.To approximate the speed of a river, a circular paddle wheel with radius 0.43 feet is lowered into the water. If the current causes the wheel to rotate at a speed of 14 revolutions per minute, what is the speed of the current? If necessary, round to two decimal places.
A. 0.07 mph B. 0.21 mph C. 37.82 mph D. 0.43 mph
Is the following correspondence a function?DomainRange 
A. function B. not a function
Evaluate or simplify the expression without using a calculator.ln 1
A. 0 B. -1 C. e D. 1