Rationalize the denominator and simplify. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 
Answer: B
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Multiply. Assume that all variables represent positive values.
(3x - 
)
A. 
x - 7
B. 
x - 
C. 3
x - 7
D. 3
x - 
Provide an appropriate response.When comparing electrical usage among utility customers, a small standard deviation indicates that the mean:
A. shows that electrical usage is decreasing B. is a typical value in the data set C. shows that electrical usage is increasing D. is not a typical value in the data set
A combination lock will open when the right choice of three numbers (from 1 to 35) is selected. How many different lock combinations are possible (duplicate numbers are allowed)?
a. 1,225 b. 42,875 c. 128,625 d. 105
Solve the problem.Use the formula D = 10.0 log (S/S0), where the loudness of a sound in decibels is determined by S, the number of watt/m2 produced by the soundwave, and S0 = 1.00 × 10-12 watt/m2. A certain noise measures 102 decibels. If the intensity is multiplied by 10, how many decibels will the new noise measure? (Round to an appropriate number of significant digits.)
A. 102 decibels B. 103 decibels C. 112 decibels D. 1020 decibels