Find the indicated matrix.Let A = 
and B = 
. Find AB.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Rationalize the denominator.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.The level of a sound in decibels (db) is determined by the formula N = 10 ? log(I × 1012) db, where I is the intensity of the sound in watts per square meter. A certain noise has an intensity of 
per square meter. What is the sound level of this noise? (Round your answer to the nearest decibel.)
A. 89 db B. 9 db C. 79 db D. 206 db
Mathematics
Evaluate.
, when p = 72 and q = 9
A. 32 B. 256 C. 252 D. 36
Mathematics
Find the partial fraction decomposition.
= 
+ 
+ 
A. A = 
, B = - 
, C = 1
B. A = 
, B = 1, C = - 
C. A = - 
, B = 
, C = 1
D. A = - 
, B = 1, C = 
Mathematics