1) Write your dilutions as a rational number AND in scientific format? What was your total dilution (in scientific notation)? 2) What was the original concentration of your culture if you spread 0.1 ml of d3 and counted 360 cfu?

Human Anatomy & Physiology (11th Edition)
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You have prepared the following serial dilution using tryptone broth:
d1: 0.1ml culture + 9.9 ml broth
d2: 300µl d1 + 4.7 ml broth
d3: 0.2ml d2 + 9800 µl broth
1) Write your dilutions as a rational number AND in scientific format? What was your total dilution (in scientific notation)?
2) What was the original concentration of your culture if you spread 0.1 ml of d3 and counted
360 cfu? 

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