State the name of the property illustrated.3 ? (19 ? 2) = (19 ? 2) ? 3
A. Distributive property of multiplication over addition
B. Commutative property of multiplication
C. Associative property of multiplication
D. Identity property of multiplication
Answer: B
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Factor the expression completely.867x2 - 432
A. (17x - 12)(51x + 12) B. (51x - 12)(17x + 12) C. 3(17x - 12)(17x + 12) D. (17x - 12)(17x + 12)
The decibel, a measure of loudness, is related to the relative intensity of sound by the formula
Decibels 
(Relative intensity).
If relative intensity is divided by 1,000, how are decibels affected?
?
A. Decibels are increased by 3. B. Decibels are decreased by 3. C. Decibels are increased by 30. D. Decibels are decreased by 30.
Solve the problem.The intensity of a certain noise is 2.65 × 10-6 W/cm2. How loud, in decibels, is this sound level? Use the formula 
where 
(Round to the nearest decibel.)
A. 110 decibels B. 50 decibels C. -13 decibels D. 104 decibels
Solve. Try factoring first. If factoring is not possible or is difficult, use the quadratic formula.
+ 
= 
A. 
B. 
C. 
D. 