Solve the problem.Use the formula D = 10.0 log (S/S0), where the loudness of a sound in decibels is determined by S, the number of watt/m2 produced by the soundwave, and S0 = 1.00 × 10-12 watt/m2. A certain noise measures 75 decibels. If the intensity is multiplied by 1000, how many decibels will the new noise measure? (Round to an appropriate number of significant digits.)
A. 75,000 decibels
B. 225 decibels
C. 105 decibels
D. 78 decibels
Answer: C
Mathematics
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Solve the problem.A rectangular swimming pool is being constructed, 18 feet long and 100 feet wide. The depth of the pool is measured at 3-foot intervals across the width of the pool. Estimate the volume of water in the pool using the Trapezoidal Rule.
A. 14,400 ft3 B. 8200 ft3 C. 10,900 ft3 D. 12,300 ft3
Mathematics
Evaluate the integral.
A. 2
+ C
B. 2
+ 3 tan-1 
+ C
C. 2
+ 3 ln 
+ C
D. 2
- 3 ln 
+ C
Mathematics
Use properties of logarithms to simplify.log5 
+ log13 
A. 
B. 
C. 
D. 32
Mathematics
Solve by any desired method. If there is no real number solution, say so.x2 + 6x = 5
A. x = -3 ± 
B. x = 3 + 
C. x = -3 ± 2
D. x = -1 ± 
Mathematics