Question

Lin counts 5 bacteria under a microscope. She counts them again each day for four days, and finds that the number of bacteria doubled each day-from 5 to 10, then from 10 to 20, and so on. a) Complete the table 1. 52 ____3 ____4. 40 5 ____

Answer 1

1. On the first day we have 5 bacteria

2. On the second day we will have 5 x 2 = 10 bacteria

3. On the third day we have 10 x 2 = 20 bacteria

4. On the fourth day we have 20 x 2 = 40 bacteria

5. On the fifth day we have 40 x 2 = 80 bacteria