Solve the problem.If x is the hydrogen ion concentration of a sample of water, then the pH of that water sample is 
If the pH of the water from one lake is 6.4 and the pH of the water from a second lake is 7.3, how many times greater is the hydrogen ion concentration of the second lake than the hydrogen ion concentration of the first lake? Round your answer to the nearest hundredth.
A. 13.82
B. 0.13
C. 7.94
D. 7.53
Answer: B
Mathematics
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? Why?
What will be an ideal response?
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Write as Decimal Number.Nine hundred and five tenths
A. 905.0 B. 0.905 C. 900.5 D. 90.5
Mathematics
Write an equation to represent the problem.The difference of twice a number and 7 is 15.
A. 2x + 7 = 15 B. 2x - 7 = 15 C. 7 - 2x = 15 D. x - 2 ? 7 = 15
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Graph the rational function.f(x) = 
A. 
B. 
C. 
D. 
Mathematics