Express the given logarithm as a sum and/or difference of logarithms. Simplify, if possible. Assume that all variables represent positive real numbers.log9
A. log919 + log919
B. log919 - log97
C. log919 ÷ log97
D. log97 - log919
Answer: B
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Evaluate the expression.
3
A. 
B. 3
C. 
D. 
Solve.If y varies jointly with x and z and inversely with n and y = 49 when x = 2, 
and 
find y when 
z = 5, and n = 10.
A. 42 B. 21 C. 35 D. 84
Find the product.-4ax4(-7ax3 + 7x2 + 6a)
A. 28ax7 - 28ax6 - 24ax4 B. 28a2x7 + 28ax6 + 24a2x4 C. 28a2x12 - 28ax8 - 24a2x4 D. 28a2x7 - 28ax6 - 24a2x4
Solve the problem.Suppose that during a certain step in a chemical manufacturing process the amount of chlorine dissolved in a solution, measured in parts per million (ppm), is related to the elapsed time measured from the beginning of the step. Use the following table as a representation of this relationship. What does the ordered pair (6, 28.4) mean in the context of this situation?
A. (6, 28.4) indicates that 6 ppm of chlorine was dissolved after 28.4 minutes elapsed. B. (6, 28.4) indicates that 28.4 ppm of chlorine was dissolved after 10 minutes elapsed. C. (6, 28.4) indicates that 28.4 ppm of chlorine was dissolved after 6 seconds elapsed. D. (6, 28.4) indicates that 28.4 ppm of chlorine was dissolved after 6 minutes elapsed.