Given -3i is a root, determine all other roots of f(x) = x3 + 2x2 + 9x + 18.
A. x = ±2, 3i
B. x = -3, ±2i
C. x = -2, ±3
D. x = -2, 3i
E. x = ±2, 3
Answer: D
Mathematics
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The velocity of a sky diver t seconds after jumping is given by  figure 1.png)
. After how many seconds is the velocity 50 ft/s?
(a) 5.0 s (b) 4.9 s (c) 8.9 s (d) 0.2 s (e) none of these
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Use the fundamental identities to find the value of the trigonometric function.Find tan ? if cos ? = 
and ? is in quadrant IV.
A. - 
B. - 
C. - 
D. 2
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Determine whether the relation is a function. Give the domain and range.{(-1, 7), (-7, 3), (8, -2), (6, -4), (-7, -8)}
A. function; domain: {-7, -1, 6, 8, -8}; range: {-8, -4, -2, 3, 7} B. not a function; domain: {-7, -1, 6, 8}; range: {-8, -4, -2, 3, 7}
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Write the variation.c varies inversely as the square of t.
A. c = 
B. c = 
C. c = 
D. c = 
Mathematics