Solve the problem.The hydrogen ion concentration of a substance is about 8.7 × 10-7 moles per liter. Find the pH. Round to the nearest tenth. Use the formula pH = -log [H+].
A. 6.5
B. -7.9
C. 6.1
D. 7.9
Answer: C
You might also like to view...
Find the product and simplify.
? y5
A. 
B. 
C. 
D. 
Find the zeros of the polynomial function. State whether the graph crosses the x-axis, or touches the x-axis and turns around, at each intercept. f(x) = -x3(x + 3)2(x - 6)
A. x = 0, touches the x-axis and turns around; x = -3, touches the x-axis and turns around; x = 6, crosses the x-axis B. x = 0, touches the x-axis and turns around; x = 3, crosses the x-axis; x = 6, crosses the x-axis C. x = 0, crosses the x-axis; x = -3, touches the x-axis and turns around; x = 6, crosses the x-axis D. x = 0, crosses the x-axis; x = 3, touches the x-axis and turns around; x = -6, crosses the x-axis
Graph the function.y = 
- 3
A. 
B. 
C. 
D. 
Find an equation of a parabola satisfying the given conditions.Focus at (-1, -9), directrix y = -11
A. (x + 9)2 = 4(y + 10) B. (x + 1)2 = 4(y + 10) C. (y + 9)2 = 4(x + 1) D. (x + 1)2 = 4(y + 9)