# A culture of bacteria is growing at a constant rate of 5% an hour. If the culture started with 3000 bacteria at 6:00 a.m. on Tuesday, calculate the approximate time that the bacteria population will reach 72,000?

##### 1 Answer

#### Explanation:

The equation for exponential growth is:

Where:

a = initial amount before measuring growth

r = growth/decay rate (often a percent)

x = number of time intervals that have passed