Solve the problem.The intensity of a certain noise is 1.28 × 10-8 W/cm2. How loud, in decibels, is this sound level? Use the formula 
where 
(Round to the nearest decibel.)
A. 82 decibels
B. 81 decibels
C. -21 decibels
D. 34 decibels
Answer: B
Mathematics
You might also like to view...
Find the domain of the rational function.f(x) = 
A. All real numbers except 0 B. All real numbers except -9 and 4 C. All real numbers except 9 and -4 D. All real numbers except 7 and -7
Mathematics
Multiply using the method indicated.310 × 246; conventional algorithm
A. 76,570 B. 76,506 C. 76,460 D. 76,260
Mathematics
Solve.Find the perimeter of the trapezoid. 
A. 
in.
B. x + 8 in.
C. 
in.
D. 
in.
Mathematics
Solve the problem.The logistic function f(t) = 
models the number of people who have become ill with a particular infection t weeks after its initial outbreak in a particular community. How many people were ill after 7 weeks?
A. 72,150 people B. 350 people C. 87,720 people D. 86,000 people
Mathematics