The count in a bacteria culture was 600 after 20 minutes and 1800 after 40 minutes. Assuming the count grows exponentially,
What was the initial size of the culture?
bacteria
Find the doubling period.
Find the population after 65 minutes.
When will the population reach 13000.

You’re repairing a large rectangular aquarium. the final step is to cover the glass with a protective film. the front and back of the aquarium measure 4 meters by 2 meters, and the sides of the aquarium measure 3 meters by 2 meters. how many square meters of protective film do you need? ( )

Convert 2000 swiss francs to dutch guilders

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.