Evaluate the expression (4 + 7i)(11 - 4i) and write the result in the form a + bi.
(a) 61 + 72i
(b) 44 + 77i
(c) 72 + 61i
(d) - 61 - 72i
(e) none of these
(c) 72 + 61i
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Graph the set of points whose polar coordinates satisfy the given equation or inequality.0 ? ? ? 
, 0 ? r ? 4
A. 
B. 
C. 
D. 
Change the logarithmic expression to an equivalent expression involving an exponent.log1/39 = -2
A. 
2 = 9
B. 
-2 = 9
C. 91/3 = 2
D. (-2)1/3 = 9
Factor the expression completely, if possible.49y4 + 56y3 + 16y2
A. y2(7y + 4)2 B. y2(7y - 4)2 C. y2(7y + 4)(7y - 4) D. (7y2 + 4y)2
Two sides and an angle are given. Determine whether the given information results in one triangle, two triangles, or no triangle at all. Solve any triangle(s) that results.B = 70°, b = 6, c = 8
A. one triangle B = 35°, A = 75°, a = 14 B. one triangle C = 34°, A = 76°, a = 16 C. one triangle C = 36°, A = 74°, a = 18 D. no triangle