The count in a bacteria culture was 900 after 10 minutes and 1300 after 30 minutes. Assuming the count grows exponentially,

What was the initial size of the culture?

Find the doubling period.

Find the population after 65 minutes.

When will the population reach 14000?

question# 2

The half-life of Palladium-100 is 4 days. After 12 days a sample of Palladium-100 has been reduced to a mass of 1 mg.

What was the initial mass (in mg) of the sample?

What is the mass 4 weeks after the start?