Solve the problem.The apportionment of the 435 seats in a certain country's representative government is determined by the total population counts in each district. The table shows the number of representatives for selected districts based on the 2000 census and the 2010 census. 
Which districts gained representatives as a result of the 2010 census?
A. 1, 12
B. 1, 12, 18
C. 4, 13, 18, 22
D. 1, 12, 39
Answer: A
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Add or subtract. Simplify the answer.
- 
A. 
B. 
C. 
D. 
Five players (A, B, C, D, and E) agree to divide a cake fairly using the lone divider method. The table below shows how each player values each of the five slices that have been cut by the divider.
Assuming all players play honestly, which player was the divider?
A. A B. B C. C D. D E. E
Solve the equation.6.2p - 24 = 7.2p - 9
A. {-16} B. {6.2} C. {-15} D. {-14}
Solve.The radioactive decay of radon 222 can be described by the equation A = Ce-0.1813t, where C is the original amount of radon and A is the amount of radon after t days. If 1.9 milligrams are in a laboratory container today, how much was there is the container 15 days ago? Round to the nearest hundredth.
A. 0.13 mg B. 86.92 mg C. 28.83 mg D. 2.03 mg