Answer:
Step-by-step explanation:
Let
x------> the number of days
y----> the cost of renting a car
we know that
For
For
The rate is equal to
so
In this problem. the car has been rented for more than a week
therefore
The cost of renting a car is equal to
The hourly growth rate of bacteria is 191.25
<u>Solution:</u>
Given that, initially Shelly put 85 bacteria and waits 4 hours
Amount of bacteria after 4 hours = 850
Now, number of bacteria increased = 850 bacteria – initial 85 bacteria
Number of increased bacteria = 850 – 85 = 765 bacteria.
So, 765 bacteria were produced in 4 hours.
So hourly growth rate( per hour) can be found out by as follows:
Hence, the hourly growth rate of bacteria is 191.25