Solve the problem.The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by 
where H+ represents the concentration of the hydrogen ions in the solution in moles per liter. Find the pH if the hydrogen ion concentration is 
A. 9.03
B. 8.97
C. 9.97
D. 8.03
Answer: D
Mathematics
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For the given polar equation, write an equivalent rectangular equation.r = 2cot ? csc ?
A. y2 = 2x
B. y = 
C. y = 2x
D. y = 2x2
Mathematics
Graph the hyperbola.
- 
= 1
A. 
B. 
C. 
D. 
Mathematics
Solve by the substitution method.x + y = -4x + y = -2
A. No solution B. (0, -6) C. (0, 0) D. (-4, -2)
Mathematics
Solve the equation.
+ x = 3
A. 
B. 11
C. 
D. 
Mathematics