Write a system of inequalities whose solution set is the region shown.
A. x2 + y2 ? 16
x ? 0
B. x2 + y2 ? 16
x ? 0
C. x2 + y2 ? 16
x ? 0
D. x2 + y2 ? 16
y ? 0
Answer: C
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Solve the problem.For the study described below, identify the sample.A researcher is interested in the level of stress among emergency-room nurses in the U.S. 275 emergency-room nurses were interviewed to determine their level of stress. Each nurse was assigned a stress rating based on his or her answers to a number of questions. The average stress rating for the 275 nurses was determined.
A. The 275 emergency-room nurses interviewed B. The average stress rating for the 275 emergency-room nurses interviewed C. All emergency-room nurses in the U.S. D. The questionnaire given to the 275 emergency-room nurses interviewed
Find the volume of the solid of revolution obtained by revolving the region bounded above by the curve
?
?
and below by the curve
?
?
from 
to 
about the 
-axis.
What will be an ideal response?
Solve the equation.
- 
= 
A. -26
B. 
C. -13
D. 13
Factor by grouping.x4 - 7x3 - 8x2 + 56x
A. (x3 - 8)(x + 7) B. x(x2 + 8)(x - 7) C. x(x2 - 7)(x - 8) D. x(x2 - 8)(x - 7)