Question

In an experiment, every hour 20% of the total number of bacteria die, and those remaining bacteria

double. If there were originally 125 bacteria, how many are there after three hours?

Answer 1

Hi there!

Your answer is;

There are 50 bacteria after 3 hours

Explanation:

After three hours, with a rate of 20% an hour, 60% should have died

20% of 125 is?

100% is 125

/100

1% is 1.25

×60

60% is 75

125-75= 50

Hope this helps