Solve the problem.The hydrogen potential, pH, of a substance is defined by pH = -log [H+], where [H+] is measured in moles per liter. Find the pH of a sample of lake water whose [H+] is 3.05 × 10-9 moles per liter. (Round to the nearest tenth.)
A. 6.4
B. 7.3
C. 10.1
D. 8.5
Answer: D
Mathematics
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Provide an appropriate response.Find the amount of increase if 500 is increased by 120%.
A. 1,100 B. 100 C. 620 D. 600
Mathematics
Find the difference.-12 - (-1)
A. 11 B. -13 C. 13 D. -11
Mathematics
Provide an appropriate response.Fill in the blanks. 2% represents 
parts out of 
equal parts.
Fill in the blank(s) with the appropriate word(s).
Mathematics
Solve the equation and check.
What will be an ideal response?
Mathematics