Solve the problem.The loudness of a sound can be approximated by the formula d = 10 log10 
, where d is the number of decibels. The higher the value of d, the louder the sound. Find the number of decibels when 
and 
A. 2 decibels
B. 100 decibels
C. 20 decibels
D. 12 decibels
Answer: C
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Provide an appropriate response.Find the average and round to the same place value as that used in the problem. Temperature averages for Caribou, Maine: 20°, 18°, 32°, 45°, 61°, 69°, 78°, 73°, 64°, 52°, 37°, 24°.
A. 48° B. 47.5° C. 47° D. 47.75°
Perform the operation indicated.
÷ 
A. 
B. 
C. x - 6
D. 
Find an equation for the indicated ellipse.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
- 
= 1
D. 
+ 
= 1
Provide an appropriate response.Describe the characteristics of an augmented matrix in diagonal or reduced-row echelon form.
A. The matrix has ones on the main diagonal and zeros everywhere else. B. The matrix has ones on the main diagonal and zeros above the main diagonal. C. The matrix has zeros on the main diagonal and ones below the main diagonal. D. The matrix has ones on the main diagonal and zeros below the main diagonal.