A biologist determined that the quantity of bacteria in a petri dish decreases by half every day of the study. If there were 8 grams of bacteria at the beginning of the study, predict how many grams will be left after 3.5 days. Round to the nearest hundredth.
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Question

anonymous · Answer

I don't know that's why I posted this question for help.

jhonyy9 · Answer

like a first step because the quantity of bacteria decreases by half every day so the half part of 8 grams of bacteria what is the cantity of begining the study will be 8/2 = ?
- than you know this cantity suppose now let x so than the cantity of bacteria decreases by x every day of study and you need to calculi how many grams will be left after 3,5 days so 
this mean that you need multiplie this resulted x cantity by 3,5 and will get the cantity what you need subtract from the begining cantity what was 8 grams and so will get how many grams will be left after 3,5 days - hope this is understandably and that will help you 

good luck

bye

anonymous · Answer

so then what's the answer?

anonymous · Answer

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jhonyy9 · Answer

sorry but you need calculi it the right answer how i have wrote to you above 

good luck