Determine the x values that cause the function to be (a) zero, (b) undefined, (c) positive, and (d) negative.f(x) = x
A. (a) {0}, (b) (-?, 0), (c) (0, ?), (d) ?
B. (a) {-9}, (b) (-?, -9), (c) (-9, ?), (d) ?
C. (a) {-9, 0}, (b) (-?, -9), (c) (-9, 0), (d) (0, ?)
D. (a) {-9, 0}, (b) (-?, -9), (c) (0, ?), (d) (-9, 0)
Answer: D
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Use the method of Gauss to find the sum.2 + 4 + 6 + . . . + 600
A. 90,300 B. 362,404 C. 22,500 D. 90,000
Find the standard deviation for each data set. Round to one more place than the data.2, 6, 15, 9, 11, 22, 1, 4, 8, 19
A. 7.1 B. 6.3 C. 2.1 D. 6.8
Rotate the axes so that the new equation contains no xy-term. Discuss the new equation.xy +16 = 0
A. ? = 45°
+ 
= 1
ellipse
center at (0, 0)
major axis is y'-axis
vertices at (0, ±4
)
B. ? = 36.9°
+ 
= 1
ellipse
center at (0, 0)
major axis is the x'-axis
vertices at (±2, 0)
C. ? = 45°
y'2 = -32x'
parabola
vertex at (0, 0)
focus at (-8, 0)
D. ? = 45°
- 
= 1
hyperbola
center at (0, 0)
transverse axis is y'-axis
vertices at (0, ±4
)
The weekly total cost function associated with manufacturing the Pulsar 25 color console television is given by 
.
?
What is the marginal average cost function 
?
?
A. 
B. 
C. 
D. 