Simplify. Express in terms of i.
A. ±5
B. -5i
C. -i
D. 5i
Answer: D
Mathematics
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Solve the formula for the indicated variable.r = 
for V
A. V = 
B. V = 3?r2h
C. V = 
D. V = 
Mathematics
Solve the problem.Use the formula s = r? to determine the value of s in the figure. Round to two decimal places, if necessary.
A. 3.82 in. B. 21.21 in. C. 1215 in. D. 2.36 in.
Mathematics
Solve the quadratic equation by completing the square.x2 + 8x - 11 = 0
A. {-4 - 9
, -4 + 9
}
B. {-4 - 3
, -4 + 3
}
C. {-8 - 3
, -8 + 3
}
D. {4 - 3
, 4 + 3
}
Mathematics
Evaluate the expression for the given replacement values. Write the answer in simplest form. x2(y - z) for x = 
, y = 
, z = 
A. 
B. - 
C. 
D. 
Mathematics