Find the quotient. 42.4 ÷ (-8)
A. -5.3
B. 5.3
C. - 
D. 6.1
Answer: A
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Solve the problem.The gross national product for the United States was 
. Round this amount to the nearest ten-billion.
A. $56,300,000,000,000 B. $56,340,000,000,000 C. $56,341,000,000,000 D. $60,000,000,000,000
Solve the equation.4 - 5x = -6
A. {2}
B. 
C. {-2}
D. 
Find an equation of the circle satisfying the given conditions.Center at (0, -10), radius 10
A. x2 + (y + 10)2 = 100 B. (x + 10)2 + y2 = 100 C. (x - 10)2 + y2 = 100 D. x2 + (y - 10)2 = 10
Solve the problem.What is the intensity in watt/m2 of a noise measured at 92 decibels? 
where S0 is 10-12 watt/m2. (Express in scientific notation, and round to three significant digits.)
A. 9.89 × 1015 watt/m2 B. 1.58 × 10-2 watt/m2 C. 9.2 × 10-10 watt/m2 D. 1.58 × 10-3 watt/m2