Solve the problem.Use the formula d = 10 log (I/I0), where the loudness of a sound in decibels is determined by I, the number of watt/m2 produced by the soundwave, and 
watt/m2. A certain noise produces 4.68 × 10-4 watt/m2 of power. What is the decibel level of this noise? Round to the nearest decibel.
A. 77 decibels
B. 87 decibels
C. 9 decibels
D. 200 decibels
Answer: B
Mathematics
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Multiply.
A. 38,016 B. 290,048 C. 12,672 D. 291,456
Mathematics
Use the mileage chart shown below to find the minimum spanning tree for the 6 cities of Atlanta, Dallas, Denver, Houston, Kansas City, and Memphis.
The length of the minimum spanning tree connecting the 6 cities is
A. 2573 miles. B. 2117 miles. C. 2227 miles. D. 2134 miles. E. none of these
Mathematics
Divide the polynomials using polynomial long division.
A. p - 3 + 
B. p - 7 + 
C. p - 3
D. p + 3 + 
Mathematics
Solve the equation for the indicated variable.x = ± 
for r
A. r = ± 
B. r = x + y
C. r = ±
D. r = ± 
Mathematics