Solve the problem.The hydrogen ion concentration [H+] of a cleaning solution is 3.4 × 10-12 moles per liter. Find the pH value of the solution to the nearest tenth. Is the cleaning solution acidic or basic?
A. pH ? 4.5, basic
B. pH ? 4.1, acidic
C. pH ? 11.5, basic
D. pH ? 13.5, basic
Answer: C
Mathematics
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Add or subtract as indicated.
+ 
A. 
B. 
C. 
D. 7
Mathematics
For the function provided, find all values of x for which f(x) satisfies the indicated condition. Graph the solution on a number line.f(x) = x2 + 4x + 3, f(x) ? 0
A. 
B. 
C. 
D. 
Mathematics
Solve the inequality. Express your answer using interval notation. Graph the solution set.3x + 8 < 35
A. (9, ?)
B. (-?, 9)
C. (-?, 9]
D. [9, ?)
Mathematics
Rationalize the denominator.
A. 
B. 
C. -1
D. 
Mathematics