Perform the indicated operations and write the answer in the form 
where a and b are real numbers.(4 - 4i)(4 - 9i)
A. -20 + 52i
B. -20 - 52i
C. 52 + 20i
D. 36i2 - 52i + 16
Answer: B
You might also like to view...
The fraction F of the surface of Earth that is visible from an altitude of h kilometers above the surface is given by
.
A. Make a graph of F versus h. Include altitudes up to 100,000 kilometers.B. What fraction of Earth's surface is visible from 1220.00 kilometers above Earth's surface? Report your answer both as a decimal (rounded to two places) and as a percentage of Earth's surface.C. Use your graph to determine the largest fraction of Earth's surface that is visible no matter what the altitude.
What will be an ideal response?
Use reduction formulas to evaluate the integral.
A. - 
cos4 5x sin 5x - 
cos2 5x sin 5x - 
cos 5x + C
B. - 
sin4 5x cos 5x - 
sin2 5x cos 5x - 
sin 10x + 
+ C
C. - 
sin4 5x cos 5x - 
sin2 5x cos 5x - 
cos 5x + C
D. - 
sin4 5x cos 5x - 
sin2 5x cos 5x - 
cos 5x + C
Find the difference.14.400 - 6.180
A. 8.120 B. 20.580 C. 8.220 D. 8.320
Multiply and simplify.
? 
A. 
B. 
C. 
D. 