Find zw or 
as specified. Leave your answer in polar form.z = 8
w = 3
Find zw.
A. 12
B. 24
C. 12
D. 24
Answer: B
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Write the number in scientific notation.89,000,000
A. 8.9 × 10-6 B. 8.9 × 107 C. 8.9 × 10-7 D. 8.9 × 106
Find the center of mass of a thin plate of constant density covering the given region.The region bounded by y = x4, x = 2, and the x-axis
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
Find at least three nonzero terms [including a0, at least two cosine terms (if they are not all zero) and at least two sine terms (if they are not all zero)] of the Fourier series for the given function.f(x) = 
A. f(x) = 
- 
+ 
B. f(x) = 
- 
+ 
C. f(x) = 
+ 
- 
D. f(x) = 
+ 
+ 
You are on a shopping trip. The store will round the amount you pay for each item to the nearest cent. Find the amount you will pay.Paper towels are 5 rolls for $25.34, so one roll is $5.0680. You pay:
A. $5.068 B. $5.17 C. $5.07 D. $5.06