2ml of a serum sample was added to 18ml of phosphate buffered saline (pbs) in tube 1. 10ml of tube 1 was added to 40ml of pbs in tube 2. what is the dilution of serum in tube 2? 3. four tubes were placed in a rack. to all four tubes, 9ml of pbs buffer was added. iml of a protein lysate was added to the first tube and mixed well. iml of the first tube is transferred to the second tube and again mixed. the transfer of 1ml from one tube to each subsequent tube continues until 1ml is discarded from the last tube. what is the dilution of protein lysate in the fourth tube?

An alternative to car buying is to make monthly payments for a period of time, and then return the vehicle to the dealer, or purchase it. this is called

Aprofessional hockey team has noticed that, over the past several seasons, as the number of wins increases, the total number of hot dogs sold at the concession stands increases. the hockey team concludes that winning makes people crave hot dogs. what is wrong with the hockey team's conclusion? a) it does not take into account the attendance during each season. b) it does not take into account the number of hamburgers sold during each season. c) it does not take into account the number of concession stands in the hockey arena. d) it does not take into account the number of seasons the hockey team has been in existence.

How can you find the mean absolute deviation (mad) for this set of data?