B=-2, all of my steps and answer are listed in this pic
44 x 9 = $396.00
It's really that easy to find the answer. Hope you have a nice day!
Answer:
The graph in the attached figure
Step-by-step explanation:
we have a exponential function of the form

where
y ---> is the population of bacteria
x ---> the number of hours
a is the initial value or y-intercept
b is the base of the exponential function
r is the rate of change
b=(1+r)
we have


so

substitute

For x=20 hours
substitute in the equation and solve for y

If it finished at 1:33 it would’ve started at 12:30
But if it finished at 16:17 (4:17) it would’ve started at 2:44
56 * .75 = 42
42+ 56 = 98
Answer is 98