+0  
 
0
294
1
avatar

a population of 75 foxes in a wildlife preserve quadruples in size every 15 years, the function y=75*4^x, where x is the number of 15 year periods, models the population growth. how many foxes will there be after 45 years?

Guest Feb 12, 2017
Sort: 

1+0 Answers

 #1
avatar+6939 
+6

Here's how I think of it: How many "15 year periods" are there in 45 years? Once I know how many fifteen year periods are in 45 years, just plug that number in for x into the function.

 

45/15 = 3

 

That means there are 3 fifteen year periods in 45 years.

 

So after 3 fifteen year periods, there will be 75*4foxes

 

That is 75(64) foxes

 

4,800 foxes

hectictar  Feb 12, 2017

17 Online Users

avatar
avatar
avatar
We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details