The loudness L(x), measured in decibels, of a sound of intensity x, measured in watts per square meter, is defined as 
watt per square meter is the least intense sound that a human ear can detect. Determine the loudness, in decibels, of the sound.At a recent Phish rock concert, sound intensity reached a level of 0.50 watt per square meter. To the nearest whole number, calculate the loudness of this sound in decibels.
A. 117 decibels
B. 112 decibels
C. 123 decibels
D. 107 decibels
Answer: A
Mathematics
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Solve the problem.Under standard conditions, molecules of a gas collide billions of times per second. If each molecule has diameter t, the average distance between collisions is given by 
where n, the volume density of the gas, is a constant. Find 
.
A. 
= 
B. 
= - 
C. 
= 
D. 
= - 
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Find an equation of an ellipse satisfying the given conditions.Vertices: (1, 1) and (-7, 1); endpoints of minor axis: (-3, -1) and (-3, 3)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 0
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Write the number in standard notation.Forty-one thousand seven hundred.
A. 41,700 B. 47,001 C. 4170 D. 41,070 E. None of these
Mathematics
Divide as indicated.
A. m2 + 2m + 7 B. 7m2 - 2m + 7 C. 7m2 + 2m + 7 D. m2 + 3m + 4
Mathematics