Under ideal conditions, the bacteria population grows exponentially. Suppose that there are 1000 bacteria initially. What is the size of the population after 18 hours? What is the size of the population after 20 hours (rounded to the nearest integer)? Estimate the size of the population after 2406 hours. (d) Graph the population function. 10,000 20,000 30,000 40,000 50,000 60,000 Estimate the time for the population to reach 50,000 (rounded to the nearest decimal place).