Solve the problem.Use the formula L = 10 ? log 
, where the loudness of a sound in decibels is determined by I, the number of watts per square meter produced by the sound wave, and 
A certain noise produces 9.92 × 10-5 watts per square meter of power. What is the decibel level of this noise?
A. 70 db
B. 184 db
C. 8 db
D. 80 db
Answer: D
Mathematics
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Solve.Use the approximations ln 3 ? 1.099 and ln 4 ? 1.386 together with the properties of natural logarithms to calculate an approximation to ln 0.75.
A. -0.288 B. -0.287 C. 1.261 D. 0.793
Mathematics
Find the total area of the region between the curve and the x-axis.y = 2x - x2; 0 ? x ? 2
A. 
B. 
C. 
D. 
Mathematics
Answer the question.True or False.Every integer is an irrational number.
Answer the following statement true (T) or false (F)
Mathematics
Perform the indicated operations and simplify. Assume all variables represent positive real numbers.
+ 6
- 3
A. 3x
B. 3x
C. 16x
D. 16x
Mathematics