Solve the problem.What is the loudness, in decibels, of a sound with intensity 
? Round to the nearest decibel.
A. 8 dB
B. 83 dB
C. 73 dB
D. 191 dB
Answer: B
Mathematics
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Use the square root property to solve the equation.(x + 2)2 = 20
A. {-2 - 2
, -2 + 2
}
B. {-2 - 2
, -2 + 2
}
C. {-2
, 2
}
D. {2
- 2, 2
+ 2}
Mathematics
Simplify the square root. Assume all variables represent nonnegative real numbers.
A. 5k7q8 
B. 5k3q4 
C. 5q4 
D. 5k3q4 
Mathematics
Solve the equation.2y4 = 50y2
A. 0, 5 B. -5, 0 C. -5, 0, 5 D. -5, 5
Mathematics
Eliminate the parameter to obtain a Cartesian equation of the curve.x = 2 + sec t, y = 5 + 2 tan t, 0 < t < 
A. (y - 2)2 - 
= 1, -? < x < ?
B. (x - 2)2 - 
= 1, x > 3
C. (x - 2)2 - (y - 5)2 = 4, -? < x < ?
D. (x - 2)2 + 
= 1, 1 ? x ? 3
Mathematics