We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
+1
67
5
avatar

I've tried but I dont exactly know how to solve this. I don't know what the "e" means or how I find the years. Please show how to solve this because I don't understand. Thanks!!

 Sep 18, 2019
 #1
avatar+19822 
+3

 e = 2.7182818284590452    (see the 'e' on the calculator?)

 

So solve this for t (the years the question is asking )

 

11200 = 5600 e.059t         First divide both sides by 5600

2 = e.059t                       Now take the ln of both sides

.693147181= .059t         Now divide both sides by .059 to find t years = 11.78 years ~~ 12 years (rounded)

 Sep 18, 2019
 #2
avatar
+2

Sorry for bothering. My teacher hasn't taught me this yet. Where did you get .693147181? What is the ln? Is it the same as the e?

Guest Sep 18, 2019
 #3
avatar+19822 
+3

ln is the natural logarithm function     ln (ex)  = x       the ln function should be on your computer/calculator to solve these type of questions

 

ln (2) = .693147181     for the left hand side of the equation

ln(e.059t) = .059t      for the right hand side of the equation

 Sep 18, 2019
 #4
avatar
+2

Oh! Okay. Now it makes more sense. Sorry again. Thank you very much for helping.

Guest Sep 18, 2019
 #5
avatar+19822 
+2

You are welcome......   you will learn a lot about   ln   log    e    10x   on down the road.....    cheeky

ElectricPavlov  Sep 18, 2019

28 Online Users

avatar