Write the fraction or mixed number as a decimal. Round to the nearest thousandth if necessary.9
A. 3.5
B. 9.25
C. 1.25
D. 37
Answer: B
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The pH of a solution is given by the formula 
, where 
is the concentration of hydrogen ions in moles per liter in the solution. Use this formula to solve the problem.Find the pH value of a sample of lake for which [H+] = 0.00000000305. Round to the nearest tenth.
A. 8.5 B. 7.3 C. 6.4 D. 10.1
Find the slope-intercept form of the line satisfying the given conditions.Through (-5, 0) and (0, -9)
A. y = - 
x - 9
B. y = 
x - 9
C. y = - 
x - 9
D. y = 
x - 9
Determine analytically (without using a graph) whether the function is one-to-one.f(x) = -8x + 5
A. one-to-one B. not one-to-one
Use a graphing calculator to sketch the graph of the quadratic equation, and then determine the x-intervals over which the graph is increasing and decreasing.y = x2 + 2x + 6
A. Increasing: (x > 1), Decreasing: (x < 1) B. Increasing: (x < 1), Decreasing: (x > 1) C. Increasing: (x > -1), Decreasing: (x < -1) D. Increasing: (x < -1), Decreasing: (x > -1)