Express the sum using summation notation. Use a lower limit of summation, not necessarily 1, and k for the index of summation.4 + 
+ 5 + 
+ . . . + 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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The life expectancy E, in years, for a child born t years after 2000 is given by
.
In what birth year would a child have a life expectancy of 78.06 years?
?
A. 2010 B. 2008 C. 2006 D. That life expectancy never occurs.
Mathematics
Determine which of the numbers are perfect squares.144, 121, 810, 400
A. 144, 121, 400 B. 144, 121, 810, 400 C. 144, 810, 400 D. 144, 121
Mathematics
Solve using matrices. 6x - 5z + w = 24-x + 6y + z - 6w = 2 3x - y + 5w = 9 y - 6z - w = -11
A. (6, -1, 2, -2) B. (-1, 6, 4, -3) C. (5, 1, -2, 0) D. (1, -1, -7, -2)
Mathematics
Evaluate.
3
A. 
B. 
C. 
D. 
Mathematics