Find sum of the pair of complex numbers.2i, 5i
A. 5 + 2i
B. 7
C. 2 + 5i
D. 7i
Answer: D
Mathematics
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Write the rational expression in simplest form.
?
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics
Evaluate the integral.
A. 
cos5 ? + C
B. 
cos4 ? + C
C. - 
cos6 ? + C
D. - 
cos7 ? + C
Mathematics
Simplify.
? 
A. 21
B. 21
C. 18
D. 42
Mathematics
Solve the problem.The half-life of plutonium-234 is 9 hours. If 20 milligrams is present now, how much will be present in 4 days? Round your answer to three decimal places.
A. 0.918 mg B. 0.012 mg C. 9.548 mg D. 14.697 mg
Mathematics