Perform the indicated operation.A factor used in measuring the loudness sensed by the human ear is 
0.3, where I is the intensity of the sound and I0 is a reference intensity. Evaluate this factor for I = 3.3 × 10-6 W/m2 and I0 = 1.0 × 10-12 W/m2 to two significant digits.
A. 0.011
B. 0.023
C. 44
D. 90
Answer: D
Mathematics
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A. 18.8 m B. 9.0 m C. 16.8 m D. 9.4 m
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Solve the initial value problem.y'(x) = 4 sec2 2x, y(0) = 5
A. y = 2 tan 2x + 4 B. y = 2 tan 2x - 5 C. y = 4 tan 2x + 5 D. y = 2 tan 2x + 5
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Find the exact value of the expression.csc 
A. 
B. 2
C. 
D. 
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Evaluate the root, if possible.- 
A. 11 B. -25 C. -5 D. 5
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