Find the sum of the series.
A. 1
B. 
C. 4
D. 
Answer: B
Mathematics
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Write the expression as a complex number in the form a + bi.7 + 
A. 5 B. 9 + i C. 7 + 2i D. 7 - 2i
Mathematics
Find the area of a sector with central angle 5 /4 ? in a circle with radius 0.5 m.
What will be an ideal response?
Mathematics
Solve the equation. Give the answer in exact form.e2x - 8ex + 15 = 0
A. {e5, e3}
B. {ln (-5), ln (-3)}
C. 
D. {ln 5, ln 3}
Mathematics
Solve the problem.The amount of a radioactive substance present, in grams, at time t in months is given by the formula 
Find the number of grams present in 2 years. If necessary, round to three decimal places.
A. 54.409 B. 527.803 C. 5278.032 D. 5.441
Mathematics