The chemical acidity of a solution is measured in units of pH: 
where 
is the hydrogen ion concentration in the solution. If a sample of rain has a pH of 3.4, how many times higher is its 
than pure water's, which has a pH of 7?
a. 
b. 
c. 7
d. 
e. 
d.
Mathematics
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Give the meaning of the metric prefix.hecto
A. 10
B. 
C. 1000
D. 100
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Determine algebraically whether the function is even, odd, or neither even nor odd.f(x) = x + 
A. Even B. Odd C. Neither
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Divide. Round your answer to the nearest hundredth when necessary.2 ÷ 5
A. 0.4 B. 4 C. 1.4 D. 14
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Find the vertex of the parabola.(x - 3)2 = 12(y - 1)
A. (1, 3) B. (3, 1) C. (-3, -1) D. (-1, -3)
Mathematics