Find the foci of the ellipse.16(x - 3)2 + 9(y + 1)2 = 144
A. (3- 
, -1), (3+ 
, -1)
B. (3, 3), (3, -5)
C. (3, -1 - 
), (3, -1 + 
)
D. (-1, 3 - 
), (-1, 3 + 
)
Answer: C
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Use inequality notation and interval notation to describe the set. ? y is at least -4 and less than 0. ?
A. Inequality : -4 > y ? 0Interval : [-4, 0) B. Inequality : -4 ? y < 0Interval : [-4, 0) C. Inequality : -4 < y < 0Interval : (-4, 0) D. Inequality : -4 ? y < 0Interval : [-4, 0) E. Inequality : -4 < y < 0Interval : [-4, 0)
At what points is the given function continuous?f(x, y) = 
A. All (x, y) such that x ? - y B. All (x, y) ? (0, 0) C. All (x, y) D. All (x, y) such that x ? y
Evaluate the expression for the given value or values.
for x = -255, y = 0
A. 0 B. -255 C. 255 D. undefined
Find a particular solution for the differential equation.
= 
; y = 9 when x = 1
A. y = ln x + 7 B. y = ln x + 9 C. y = 23 ln x + 11.5 D. y = 23 ln x + 9