1. Paige cultured 100,000 paramecium (unicellular). Ten days later, the population grew to 500,000 paramecium cells. Calculate the intrinsic rate of increase (r) for her population. (Show all calculations to receive any credit).

2. For the above paramecium population (Q.1) above, use the exponential model of population growth to predict the size of the population after another 10 days. (Show all calculations to receive any credit).