Solve each problem.The hydrogen potential, pH, of a substance is defined by 
where 
is measured in moles per liter. Find the pH of a sample of lake water whose 
is 3.05 x 10-9 moles per liter. (Round to nearest tenth.)
A. 6.4
B. 10.1
C. 8.5
D. 7.3
Answer: C
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Use l'Hopital's Rule to evaluate the limit.
A. ?
B. 1
C. 
D. 
Find two different Hamilton paths for the given graph.
A. F ? G ? H ? I ? E ? D ? C ? B ? A ; C ? B ? A ? D ? E ? I ? H ? F ? G B. G ? H ? I ? E ? D ? A ? B ? C ; F ? F ? I ? E ? D ? C ? B ? A C. D ? A ? B ? C ? D ? E ? I ? H ? G ? F ; H ? G ? F ? H ? I ? E ? D ? A ? B ? C D. The graph does not have two different Hamilton paths.
If the following is a polynomial function, then state its degree and leading coefficient. If it is not, then state this fact.f(x) = 18x6 - 9x5 - 5x4
A. Degree: 6; leading coefficient: 18 B. Degree: 4; leading coefficient: 18 C. Degree: 18; leading coefficient: 6 D. Not a polynomial function.
Add or subtract.
+ 
A. x2 - x - 10
B. 
C. 1
D. 0