Write the expression in the form a + bi, where a and b are real numbers.
? 
A. 2
B. -2i
C. 2i
D. -2
Answer: D
Mathematics
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Solve the problem.The length of the ellipse x = a cos t, y = b sin t, 0 ? t ? 2? is Length = 4a
where e is the ellipse's eccentricity.Use Simpson's Rule with n = 6 to estimate the length of the ellipse when a = 2 and e = 1/3.
A. 11.2546 B. 12.2097 C. 11.8956 D. 12.1751
Mathematics
Decide whether the given replacement value is a solution of the given equation.Is - 
a solution to 8x = - 
?
A. Yes B. No
Mathematics
Simplify the expression. Assume all variables represent positive real numbers.(
+ 3)(
+ 5)
A. 
+ 5
+ 3
+ 15
B. 
+ 8
+ 15
C. 9
+ 15
D. 
+ 15
Mathematics
Plot the point in a polar coordinate system.(3.5, -?)
A. 
B. 
C. 
D. 
Mathematics