Find an equation of variation for the given situation.y varies jointly as x and the square of z and inversely as w , and y = 
when 
and 
A. y = 
B. y = 
C. y = 
D. y = 
Answer: B
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Express the number in scientific notation.66.382
A. 6.6382 x 101 B. 6.6382 x 10-2 C. 6.6382 x 102 D. 6.6382 x 10-1
Write the polynomial in standard form. Then find its degree and leading coefficient.-3x3 - 8x4 + 19x5 + 12
A. 19x5 - 8x4 - 3x3 + 12, degree: 13, leading coefficient: 19 B. -3x3 - 8x4 + 19x5 + 12, degree: 12, leading coefficient: -3 C. -3x3 - 8x4 + 19x5 + 12, degree: 5, leading coefficient: -3 D. 19x5 - 8x4 - 3x3 + 12, degree: 5, leading coefficient: 19
Write out the first five terms of the sequence.an = 
A. - 
, - 
, 
, 
, 
B. 1, - 
, 1, 
, 1
C. - 
, 1 , 
, 1 , 
D. 1, 1, 1, 1, 1
Find the center, foci, and vertices of the ellipse.4x2 + 81y2 = 324
A. center at (0, 0)
foci at (- 
, 0) and (
, 0)
vertices at (-9, 0), (9, 0)
B. center at (0, 0)
foci at (-9, 0) and (9, 0)
vertices at (-81, 0), (81, 0)
C. center at (0, 0)
foci at (0, - 
) and (0, 
)
vertices at (0, -9), (0, 9)
D. center at (0, 0)
foci at (0, -2) and (0, 2)
vertices at (0, -4), (0, 4)