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
Answer: A
Mathematics
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Provide an appropriate response.If 
= 4, find 
.
A. 16 B. 2 C. 8 D. 4
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Use factoring techniques to solve the equation.5(x - 3) = -20x + 5(x2 - 9)
A. {-1, 5, -6} B. {6, 1, 5} C. {-1, 6} D. {1, -6}
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Sketch the region which is defined by the given conditions.? ? ? ? 
, r = -4
A. 
B. 
C. 
D. 
Mathematics
Evaluate the integral.
A. 
x + 
sin 5x + 
sin 20x + C
B. 
x + 
sin 10x + 
sin 20x + C
C. 
x + 
sin 5x + 
sin 10x + C
D. 
x + 
sin 10x + 
sin 20x + C
Mathematics