8: How long before the oysters are unsafe?

So, back to the grindstone. Let’s figure out what to do all those oysters.

Based on lab tests, each oyster has 400,000 Vibrio at 9am. Assuming it was infected by a single cell at 5pm, then

1. What is the doubling rate of the Vibrio?
2. How long till the infective dose of 1 million is reached?