1. 
In the collection of viruses at Big Town University, they had 20 kinds of viruses. If threefifths of them were animal viruses, how many were not animal viruses?


2. 
Ohoh, rats have moved into Mr. Bloop's back yard. If the colony has 4 members now but doubles in size every year, how many rats might there be in Mr. Bloop's back yard after five years?


3. 
Rat snakes produce 727 eggs once or twice a year. If 9% of the young survive to maturity, what is the maximum number of surviving offspring a rat snake would be expected to produce in 5 years?


4. 
Professor Bloop estimated there were twentyone million bacteriophages in a petri dish of bacteria. If he had eighteen such petri dishes, what was the total number of bacteriophages?


5. 
* This is a premade sheet. Use the link at the top of the page for a printable page. 

6. 
At the Smallville Animal Hospital it costs $40 dollars to perform a procedure on a dog that weighs greater than 35 pounds, and $23 dollars for a dog that weighs from 20 to 35 pounds. What would be the total cost to perform the procedure on a group of dogs that had the following weights (in pounds): 40, 45, 36, 35, 24, 39 and 38?

