Add or subtract. Express the answer as a mixed number.6
+ 4
A. 2
B. 11
C. 10
D. 11
Answer: B
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Solve.Important news is said to diffuse through an adult population of fixed size L at a time rate proportional to the number of people who have not heard the news. Eight days after a scandal in the mayor's office was reported, a poll showed that half of the people had heard about it. How long will it take for 94% of the people to hear about it?
A. 34 days B. 29 days C. 35 days D. 32 days
Find the volume of the described solid.The solid lies between planes perpendicular to the x-axis at x = ?/6 to x = ?/2. The cross sections perpendicular to the x-axis are circular disks with diameters running from the curve 
to the curve 
A. 
- 
B. (
- 1) ? + 
C. 
- 
D. (2
- 2) ? - 
Solve the rational inequality. Express the solution using interval notation.
< 0
A. (2, ?) B. (-8, 2) C. (-?, -8) D. (-?, -8) ? (2, ?)
Determine what signs on values of x and y would make the statement true. Assume that x and y are not 0.xy < 0
A. x and y have the same sign. B. x and y must be negative. C. x and y must be positive. D. x and y have different signs.