Solve the problem.The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by 
where H+ represents the concentration of the hydrogen ions in the solution in moles per liter. Find the pH if the hydrogen ion concentration is 
A. 2
B. -2
C. 12
D. -12
Answer: A
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Multiply. Assume that no radicands were formed by raising negative numbers to even powers.4
(
+ 
)
A. 4
+ 7
B. 4
+ 28
C. 28
+ 28
D. 4
+ 7
The table shows the fraction of the world's surface land area taken up by each continent. Use the table to answer the question. Write your answer in simplest form. Continent Fraction of World's Surface Land Area North America 
South America 
Europe 
Africa 
Asia 
style="vertical-align: -17.0px;" /> Australia 
Antarctica 
How much greater is the fractional part of the continent of Asia than the fractional part of the continent of North America?
A. 
B. 
C. 
D. 
Translate the percent problem to a proportion using x for the unknown value. Do not solve the proportion.40 is 98% of what?
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Solve the linear inequality. Express the solution using set-builder notation and interval notation. Graph the solution set.8x - 6 ? 7x - 6
A. {x|x ? 0}; [0, ?)
B. {x|x ? 1}; (-?, 1]
C. {x|x ? 12}; [12, ?)
D. {x|x > - 12}; (- 12, ?)