Express the sum in sigma notation.7 + 8 + 9 + 10 + 11 + 12
A. 
+ 7
B. 
C. 
D. 
k
Answer: C
Mathematics
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Find the derivative at each critical point and determine the local extreme values.y = x2
A. 
B. 
C. 
D. 
Mathematics
Solve the equation. Write the answer in a + bi form.x2 - i = 0
A. -1, 1
B. -i, i
C. 
+ 
, - 
- 
D. 
- 
, - 
+ 
Mathematics
Write the number as indicated.An expensive telescope has found evidence that the universe contains about121,400,000,000 galaxies. Write the number in words.
A. One hundred twenty-one billion, four hundred thousand galaxies B. One hundred twenty-one billion, four hundred million galaxies C. One hundred twenty-one billion, four million dollars galaxies D. One hundred twenty-one million, four thousand galaxies
Mathematics
Find the real solutions of the equation.
= -1
A. {-2} B. {-1} C. {2} D. {1}
Mathematics