Solve the problem.The intensity of a certain noise is 4.65. How loud, in decibels, is this sound level? Use the formula 
where 
(Round to the nearest decibel.)
A. 75 decibels
B. -8 decibels
C. 67 decibels
D. 64 decibels
Answer: C
Mathematics
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Find the product.(p - r)(p + r)
A. p2 - r2 B. 2p2 - r2 C. p2 - 2r2 D. p2 + r2
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Raise the fraction to the indicated power.
2
A. 
B. 
C. 
D. 
Mathematics
Determine whether the function is a solution of the wave equation.w = e10ct cos 10x
A. Yes B. No
Mathematics
Solve the problem. Give an exact answer and an approximation to the nearest tenth.The diagram below shows the side view of a plan for a slanted roof. Find the unknown length in this roof plan.
A. 
ft ? 18.0 ft
B. 
ft ? 5.0 ft
C. 
ft ? 10.7 ft
D. 
ft = 162.5 ft
Mathematics