Solve the equation by completing the square.a2 - 8a = 20
A. {±
}
B. {10, -2}
C. {-10, 2}
D. {-18, -2}
Answer: B
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Solve the problem.Find the expected number of girls in a family of 3 children.
A. 2 B. 2.5 C. 1.5 D. 2.25
Find the sum and simplify the answer. 
A. 
B. 
C. 
D. 
Use the given information about an earthquake to find the missing values.Use the energy E released by an earthquake to find (a) the magnitude of the earthquake and (b) the earthquake intensity I in terms of the zero-level earthquake intensity I0.E = 1011 joules
A. (a) 4.4 (b) 2.51 × 104 I0. B. (a) 3.4 (b) 3.51 × 105 I0. C. (a) 4.5 (b) 4.51 × 103 I0. D. (a) 5.3 (b) 2.51 × 105 I0.
Provide an appropriate response.What are the possible numbers of real zeros (counting multiplicities) for a polynomial function with real coefficients of degree six?
A. 6 B. 0, 2, 4, or 6 C. 2, 4, or 6 D. 1, 3, or 5