Solve the problem. Round your answer to the nearest tenth, when appropriate. Use the formula 
, as needed.Find the pH if [H3O+] = 4.1 × 10-9.
A. 8.6
B. 9.6
C. 8.4
D. 9.4
Answer: C
Mathematics
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Find the volume of the solid generated by revolving the shaded region about the given axis.About the x-axis
A. 8?2 - 16? B. 8?2 - 4? C. 8?2 D. 8?2 + 16?
Mathematics
Match the given equation with one of the graphs.x2 + y2 - 6x - 12y = -29
A. 
B. 
C. 
D. 
Mathematics
Evaluate the factorial expression.
A.
B. 1
C. 9!
D. 9
Mathematics
Solve the problem.If (a, 3) is a point on the graph of y = 2x - 5, what is a?
A. -4 B. -1 C. 1 D. 4
Mathematics