Solve the equation by completing the square.-x2 + 2x = -4
A. 
B. {1, 5}
C. {1 ± 
}
D. {-1 ± 
}
Answer: C
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Solve the problem.A rotating drill head is in the shape of a right circular cone Find the moment of inertia of the drill head with respect to its axis if its radius is 4.4 mm, its height is 7.8 mm, and its mass is 
A. 50 g?mm2 B. 47 g?mm2 C. 15 g?mm2 D. 3.4 g?mm2
Solve the problem. Express the answer in scientific notation to two decimals.A computer can do one calculation in 1.4 × 10-7 seconds. How long would it take the computer to do a trillion (1012) calculations?
A. 1.4 × 1012 sec B. 1.4 × 106 sec C. 1.4 × 105 sec D. 1.4 × 10-7 sec
Solve the problem.An artifact is discovered at a certain site. If it has 67% of the carbon-14 it originally contained, what is the approximate age of the artifact to the nearest year? (carbon-14 decays at the rate of 0.0125% annually.)
A. 3204 years B. 1391 years C. 5360 years D. 2640 years
Find the sum.-15 + (-19)
A. -35 B. 34 C. -34 D. -4