Find the vertex, focus, and directrix of the parabola with the given equation.(y + 1)2 = -20(x + 3)
A. vertex: (-1, -3)
focus: (-6, -3)
directrix: x = 4
B. vertex: (3, 1)
focus: (-2, 1)
directrix: x = 8
C. vertex: (-3, -1)
focus: (-8, -1)
directrix: x = 2
D. vertex: (-3, -1)
focus: (2, -1)
directrix: x = -8
Answer: C
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Find the derivative.r = 17 - ?8 cos ?
A. 
= 8?7 cos ? - ?8 sin ?
B. 
= 8?7 sin ?
C. 
= 8?7 sin ? - ?8 cos ?
D. 
= - 8?7 cos ? + ?8 sin ?
Provide an appropriate response.Define f(0, 0) in a way that extends f(x, y) = 
to be continuous at the origin.
A. f(0, 0) = 2 B. f(0, 0) = 16 C. f(0, 0) = 0 D. f(0, 0) = 8
Use the product rule to simplify the expression. Assume that the variables can be any real number.
A. 5
B. 125x
C.
5  ? |
D. 5x2
Find the proceeds to the nearest cent when the following is discounted.Maturity value: $97,600Discount period: 30 daysDiscount rate: 11%
A. $86,864.00 B. $96,717.59 C. $96,705.33 D. $86,964.00