Provide an appropriate response.The loudness of sound is measured by a unit called a decibel. A very faint, or threshold sound, has an intensity of l0, while other sounds have intensity l, which is a specified number time the threshold sound. The decibel rate is given by the formula decibel = 10 log
. Use this formula to find the decibel rating for a sound having intensity 200,000l0
A. 6.30 decibels
B. 5.30 decibels
C. 122.06 decibels
D. 53.01 decibels
Answer: D
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= 4 in. and 
= 5 lb
A. 
ft-lb
B. - 
ft-lb
C. 
ft-lb
D. 
ft-lb
Using the Divergence Theorem, find the outward flux of F across the boundary of the region D.F = (y-x)i + (z-y)j + (z-x)k ; D: the region cut from the solid cylinder x2 + y2 ? 49 by the planes z = 0 and 
A. 98? B. 0 C. -98? D. -98
Simplify the expression.
A. 
B. 
C. 
D. 31
Solve the problem.A certain radioactive isotope decays at a rate of 1% per 400 years. If t represents time in years and y represents the amount of the isotope left, use the condition that 
to find the value of k in the equation 
A. -0.01005 B. 0.00003 C. 0.00673 D. -0.00003