Perform the indicated operations and write the result in standard form.(8 + 9i)(4 - i) - (1 - i)(1 + i)
A. 39 + 28i
B. 43 + 28i
C. 39 + 44i
D. 41 + 28i
Answer: A
Mathematics
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Perform the indicated operation. Simplify, if possible.
+ 
A. 
B. 
C. 
D. 
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Use a calculator to find the approximate value of the expression rounded to two decimal places.sec 
A. 1.11 B. 0.98 C. 0.87 D. 1.00
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Find the volume of a sphere with radius 3.1 cm. Round the answer to one decimal place.
What will be an ideal response?
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Use the quotient rule and the product rule to simplify each radical.
A. 
B. 
C. 
D. 
Mathematics