Solve the problem. Round your answer to the nearest tenth, when appropriate. Use the formula 
, as needed.Find the pH if [H3O+] = 7.9 × 10-6.
A. 5.1
B. 6.1
C. 6.9
D. 5.9
Answer: A
Mathematics
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Choose the equation that matches the graph.
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
+ 
= 1
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Write the mixed number as an improper fraction.7
A. 
B. 
C. 
D. 
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Use the product rule to multiply. Assume all variables represent positive real numbers.
? 
A. 
B. x2 - 49
C. 
D. 
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Use = or ? for ? to write a true sentence.
? - 
A. ? B. =
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