Write the expression in the standard form a + bi.Given w = 9 + 4i, evaluate w - 
.
A. 18
B. 0
C. 8i
D. -18 + 8i
Answer: C
Mathematics
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Find the center of mass of a thin plate of constant density covering the given region.The region bounded by the parabola y = 81 - x2 and the x-axis
A. 
= 0, 
= 
B. 
= 0, 
= 
C. 
= 
, 
= 0
D. 
= 0, 
= 
Mathematics
Provide an appropriate response.40 cl - 200 ml = ? ml
A. 160 B. 3,800 C. 200 D. 38,000 E. none of the above
Mathematics
Write the rational expression in lowest terms.
A. 
B. 
C. 
D. - 
Mathematics
Rationalize the denominator.
A. 
B. 
C. 
D. 
Mathematics