Solve the problem.In a chemistry class, 6 liters of a 4% silver iodide solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed?
A. 4.0 L
B. 2.0 L
C. 6.0 L
D. 3.0 L
Answer: D
Mathematics
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A. 448 B. 92 C. 259 D. 130
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Add or subtract as indicated. Write the answer in lowest terms.
+ 
A. 
B. 
C. 
D. 
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Solve the logarithmic equation.log (x + 10) - log (x + 4) = log x
A. 2, -5 B. 6 C. 2 D. ?
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