The count in a bacteria culture was 100 after 15 minutes and 1400 after 35 minutes. Assuming the count grows exponentially, What was the initial size of the culture? Find the doubling period. Find the population after 75 minutes. When will the population reach 14000.

If the population of a Nigeria doubles in 9 years, find the growth rate k. Assume that the population increases exponentially.

The count in a bacteria culture was 400 after 15 minutes and 1200 after 35 minutes. Assuming the count grows exponentially,What was the initial size of the culture?   Find the doubling period.   Find the population after 80 minutes.   When will the population reach 10000.   You may enter the exact value or round to 2 decimal places.

You add 6 paramecia to a test tube and feed them bacteria. One week  later the population has grown to 15. Assuming that the population is growing exponentially, how many paramecia can you expect after 7 weeks? Round your answer to the closest full number.