Rectangular coordinates of a point are given. Use a graphing utility in radian mode to find polar coordinates of the point.(-3, -6) Express both r and ? to two decimal places.
A. (6.71, -2.03)
B. (6.71, - 1.11)
C. (6.71, 1.11)
D. (6.71, + 2.03)
Answer: A
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Determine whether the system corresponding to the given augmented matrix is dependent or inconsistent. If it is dependent, give the solution.
A. dependent; (5, -4, -4) B. dependent; (5 + 4z, y = -4 - 3z, z) C. dependent; (5 - 4z, -4 + 3z, z) D. inconsistent
Solve.The population of a certain country is growing at a rate of 2.6% per year. How long will it take for this country's population to double? Use the formula 
which gives the time, t, for a population with growth rate k, to double. Round to the nearest year.
A. 27 yr B. 29 yr C. 28 yr D. 26 yr
Use the given matrices to compute the given expression.Let C = 
and D = 
. Find C - 3D.
A. 
B. 
C. 
D. 
Simplify the expression.
- csc x
A. 0 B. tan x C. sec x D. 1