Solve the problem.A certain noise produces 7.48 × 10-4 Watts/m2 of power. What is the decibel level of this noise? The level of sound intensity in decibels (dB) is 
where ? (beta) is the number of decibels, I is the sound intensity in W/m2, and I0= 
(Round to the nearest decibel.)
A. 79 decibels
B. 9 decibels
C. 204 decibels
D. 89 decibels
Answer: D
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Subtract and simplify.
- 
A. 
B. 
C. 
D. 
Simplify.
A. 
B. 22x
C. 
D. 
According to the Massachusetts Department of Welfare, the spending (in billions of dollars) by Medicaid, the national health-care plan for the poor, over the 5-yr period from 1988 to 1992 is summarized in the accompanying table.
Find an equation of the least-squares line for these data. Please round the coefficients in your equation to three decimal
places. Use the result of to estimate Medicaid spending for the year 1994, assuming the trend continued.
a. y = 0.114x + 1.550; $2.262 billion
b. y = 0.117x + 1.546; $2.217 billion
c. y = 0.114x + 1.550; $2.234 billion
d. y = 0.117x + 1.546; $2.248 billion
Determine whether the following is always true or not always true. Given reasons for your answers.u × v = -(v × u)
What will be an ideal response?