Solve the problem.The voltage E in an electrical circuit is given by E = 5.6 cos 40?t, where t is time measured in seconds. Find the frequency of the function (that is, find the number of cycles or periods completed in one second).
A. 20
B. 40
C. 
D. 
Answer: A
Mathematics
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Solve the equation.
- 
= 0
A. {-7, 3} B. {-7} C. ? D. {3}
Mathematics
Write as a radical expression. Simplify if possible.
2/3
A. 
2= 
B. 
2 = 
C. 
2 = 
D. 
2 = - 
Mathematics
Use synthetic division to divide f(x) by x - c, and then write f(x) in the form f(x) = (x - c)q(x) + r.f(x) = x5 - 3x4 - 7x3 - 12x2 - 13x - 7; x - 5
A. (x - 5)(x4 + 2x3 + 3x2 + 3x + 2) + 3 B. (x - 5)(x4 + 2x3 + 3x2 + 3x + 3) + 0 C. (x - 5)(x4 + 2x3 + 3x2 + 3x - 2) + 5 D. (x - 5)(x3 + 2x2 + 3x + 3) + 3
Mathematics
Solve the problem.A hotel manager predicted an average occupancy rate of 
during the slow season. The occupancy rate turned out to be 0.48. Was the manager better off or worse off than he expected to be?
A. Worse off B. Better off
Mathematics