$\"\"$

The function $\"\"$ .

Where,

t is time in hours.

A is initial number of bacteria.

B is number of bacteria after some time t.

$\"\"$

Find how many hours it take the number of bacteria to reach $\"\"$ .

Initial number of bacterial present is $\"\"$ .

Number of bacteria after some time t is $\"\"$ .

$\"\"$

$\"\"$ .

It take the number of bacteria to reach $\"\"$ is $\"\"$ hours.

$\"\"$

Find average rate of change in bacteria per hour.

average rate of change in bacteria $\"\"$

$\"\"$

$\"\"$ .

Average rate of change in bacteria per hour is $\"\"$ . $\"\"$

a. It take the number of bacteria to reach $\"\"$ is $\"\"$ hours.

b. Average rate of change in bacteria per hour is $\"\"$ .