Find v ? u.v = 2i + 6j and u = 2i + 5j
A. 4i + 30j
B. 4i + 11j
C. 34
D. -26
Answer: C
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Suppose an arc of length s lies on the unit circle x2 + y2 = 1, starting at point (1, 0) and terminating at the point (x, y). Use a calculator to find the approximate coordinates (x, y). Round coordinates to four decimal places when appropriate. 
s = 5.6
A. (-0.7756, 0.6313) B. (-0.7756, -0.6313) C. (0.7756, -0.6313) D. (-0.6313, 0.7756)
Solve the matrix equation.
= 
A. x = -2, y = 3, z = 5 B. x = -2, y = -3, z = 1 C. x = 2, y = 3, z = 5 D. x = 2, y = -3, z = 1
Graph the function and its inverse using the same set of axes. Use any method.f(x) = 4x; f-1(x) = log4 x
A. 
B. 
C. 
D. 
Solve the problem.A twin-engined aircraft can fly 952 miles from city A to city B in 4 hours with the wind and make the return trip in 7 hours against the wind. What is the speed of the wind?
A. 68 mph B. 85 mph C. 34 mph D. 51 mph