Fill in the blank with one of the words or phrases listed below.
The 
written i, is the number whose square is -1.
A. complex number
B. imaginary unit
C. conjugate
D. radicand
Answer: B
Mathematics
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Classify the angle as acute, right, obtuse, or straight.
A. Obtuse B. Acute C. Straight D. Right
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Replace the question mark by < or > to make a true statement.
? 
A. > B. <
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Solve the problem.A certain noise has an intensity I of 
. Given that decibel level D is related to intensity by 
, where Io is 10-12, determine the decibel level of the noise. Round your answer to the nearest decibel.
A. 78 decibels B. 9 decibels C. 202 decibels D. 88 decibels
Mathematics
Solve the problem.Use inverse matrices to find the equilibrium point for the demand and supply curves below.p = 110 - 12xDemand curvep = 20 + 13xSupply curve
A. 
B. 
C. 
D. (90, 1190)
Mathematics