Find the center and radius of the circle.x2 + y2 + 16x + 6y + 24 = 0
A. center: (3, 8); radius: 49
B. center: (-8, -3); radius: 7
C. center: (-3, -8); radius: 7
D. center: (8, 3); radius: 49
Answer: B
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Use properties of logarithms to expand the logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator.log3
A. log37 + log311 - log313
B. log3(
)
C. log35
D. log377 - log313
Find the solution set of the linear system. Identify inconsistent systems and dependent equations. For dependent equations, write your answer as an ordered triple in terms of z.
A. dependent; 
B. dependent; 
C. inconsistent
D. dependent; 
Write the quotient in the form a + bi.
A. 
+ 
i
B. 
+ 
i
C. - 
+ 
i
D. - 
+ 
i
Solve the problem.What is the intensity in watt/m2 of a noise measured at 66 decibels? D = 10 log10(S/S0), where S0 is 10-12 watt/m2. Round to two decimal places when necessary.
A. 7.35 × 1014 watt/m2 B. 3.98 × 10-5 watt/m2 C. 3.98 × 10-6 watt/m2 D. 6.6 × 10-10 watt/m2