Solve the problem.The hydrogen ion concentration [H+] of a cleaning solution is 5.4 × 10-12 moles per liter. Find the pH value of the solution to the nearest tenth. Is the cleaning solution acidic or basic?
A. pH ? 11.3, basic
B. pH ? 13.7, basic
C. pH ? 4.3, basic
D. pH ? 6.5, acidic
Answer: A
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First, rewrite each equation in exponential form. Then, use a table of coordinates and the exponential form to graph the logarithmic function. Begin by selecting -2, -1, 0, 1 and 2 for y. Finally, based on your graph, describe the shape of a scatter plot that can be modeled by f(x) = log b x, 0 < b < 1.y = log1/7 x
A. 
increasing
B. 
decreasing,
although rate of decrease is slowing down
C. 
increasing,
although rate of increase is slowing down
D. 
decreasing,
although rate of decrease is slowing down
Describe the figure as completely as possible, using the properties simple, closed, polygonal curve, and polygon.
A. Polygon B. Polygonal curve C. Simple, not closed D. Closed
Solve the equation for the unknown variable.log5d = 3
A. d = 243 B. d = 15 C. d = 8 D. d = 125
The Armstrongs wish to establish a custodial account to finance their children's education. If they deposit $200 monthly for 10 years in a savings account paying 8% /year compounded continuously, how much will their savings account be worth at the end of this period? Round your answer to the nearest dollar. ? $__________
Fill in the blank(s) with the appropriate word(s).