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 x represents the concentration of the hydrogen ions in the solution in moles per liter. Find the hydrogen ion concentration if the 
A. 2.51 × 10-2
B. 3.98 × 10-2
C. 3.98 × 10-3
D. 2.51 × 10-3
Answer: C
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Find the volume of the solid generated by revolving the region bounded by the given lines and curves about the 
. y = 
, y = 1, x = 0 to x = 
A. 
+ ?
B. 
- 
C. 
- 
D. 
- ?
Find the equation of the hyperbola satisfying the given conditions.Vertices at (0, 8) and (0, -8); asymptotes y = 
x and y = - 
x
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Find an equation of the line described. Write the equation in slope-intercept form if possible.Slope 4, through (2, 3)
A. y = 4x + 5 B. x = 4y + 5 C. y = 4x - 5 D. x = 4y - 5
Formulate but do not solve the problem.
Michael Perez has a total of $1,500 on deposit with two savings institutions. One pays interest at the rate of 8%/year, whereas the other pays interest at the rate of 5%/year. If Michael earned a total of $96 in interest during a single year, how much does he have on deposit in each institution?