pre calc question please help asap?

S

Stéphanie

New member
The count in a bateria culture was 400 after 20 minutes and 2000 after 35 minutes.

What was the initial size of the culture? _________

Find the doubling period. ____________

Find the population after 60 minutes. ____________

When will the population reach 11000? ____________

please explain
 
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