Solve.In the study of alternating electric current, capacitive voltage is given by 
, where f is the number of cycles per second, i is the maximum current, and t is the time in seconds. Solve the equation for t.
A. t = 
arccos 
B. t = 
arccos 
C. t = 2?f cos 
D. t = 2?f arccos 
Answer: A
Mathematics
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Graph the exponential function and state the domain and range.y = 
x
A. Domain: (-?, ?), Range: (-?, 0)
B. Domain: (-?, ?), Range: (0, ?) 
C. Domain: (-?, 0), Range: (-?, 0)
D. Domain: (0, ?), Range: (0, ?)
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Solve the equation in the real number system.2x4 - 19x3 + 74x2 - 127x + 78 = 0
A. 
B. 
C. 
D. 
Mathematics
An astronaut who weighs 183 pounds on Earth would weigh 50 pounds on the Theta Space Station. If a piece of equipment weighed 2164 pounds on Earth, what would it weigh on the Theta Space Station? Round your answer to the nearest pound.
a. 592 lb b. 638 lb c. 591 lb d. 637 lb
Mathematics
Evaluate the integral in terms of natural logarithms.
A. 
ln 15
B. 
ln 
C. ln 29
D. ln -6
Mathematics