Solve.A generator produces an alternating current according to the equation 
, where t is time in seconds and I is the current in amperes. What is the smallest time t such that I = 12?
A. 
sec
B. 
sec
C. 
sec
D. 
sec
Answer: D
Mathematics
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Describe the domain of the function of three or more varables.f(x, y, z) = 
A. All points in ?3 that satisfy 6x2 + 8xy2 + 5z2 > 0. B. All points in ?3. C. All points in ?3 that satisfy 6x2 + 8xy2 + 5z2 ? 0. D. All points in ?3 except where x = 0, or y = 0, or z = 0.
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Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves about the given lines.y = 3x,
y = x2; revolve about the y-axis
A. 
?
B. 
?
C. 
?
D. - 
?
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Express in terms of i.
A. 11i
B. ±11
C. -i
D. -11i
Mathematics
Express the phrase as a ratio in lowest terms.21 miles to 12 miles
A. 
B. 
C. 
D. 
Mathematics