The ratio of substance X to substance Y in a solution is measured ...

[ts19998]

The ratio of substance X to substance Y in a solution is measured in two separate trials. The concentrations, ratios of X/Y, and log(X/Y) are presented in this table.
 
  Trial Concentration of X Concentration of Y Ratio X/Y log(X/Y)
  1 20 10 2 0.301
  2 10 20 0.5 ?
 
  What is the log of X/Y from trial 2?
  A) 0.301
  B) -0.301
  C) 3.01
  D) -3.01

Question 2

Consider the following expression. 9 - (-3) Which of the following expressions is another way of writing this?
 
  A) 3 + 9
  B) 3 - 9
  C) 9 + 3
  D) 9 - 3

[emilymalinowski12]

Answer to Question 1

B

Answer to Question 2

C

[ts19998]

Thanks for the timely response, appreciate it

[nanny]

Great answer, keep it coming