Write the expression as a complex number in the form a + bi.
+ 
A. 0 + 13i
B. 0 - 13i
C. -13 + 0i
D. 0 + 36i
Answer: A
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Write a word name for the number in the sentence.Repeating patterns in numbers like 600,060,006,000 held mystical significance for most of the members of the village.
A. sixty billion, six hundred million, six B. six hundred billion, sixty million, six thousand C. six hundred million, sixty thousand, six D. six billion, six hundred million, sixty thousand
Use the fundamental identities to simplify the expression.sin2? + tan2? + cos2?
A. tan2? B. sin ? C. sec2? D. cos3?
An object is attached to a coiled spring. The object is pulled down (negative direction from the rest position) and then released. Write an equation for the distance of the object from its rest position after t seconds.amplitude = 13 in.; period = 8 seconds
A. d = -13 sin 
?t
B. d = -8 cos 
?t
C. d = -13 cos 
t
D. d = -13 cos 
?t
Write four additional terms of the geometric sequence.6, -18, 54, . . .
A. 162, 486, 1458, 4374 B. -162, -486, -1458, -4374 C. 162, -486, 1458, -4374 D. -162, 486, -1458, 4374