# Homework Help: Sustainable Energy Calculation for Fossil Fuel Mix

1. Dec 11, 2017

### King_Silver

1. The problem statement, all variables and given/known data

2. Relevant equations
No equations used (to my knowledge). Just arithmetic and understanding of what is being asked.

3. The attempt at a solution

Was wondering if my solution/approach to this question is correct or not? I don't have any answers to compare it to so any method/answer I do arrive at is mere speculation.

2. Dec 16, 2017

### PF_Help_Bot

Thanks for the thread! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post? The more details the better.

3. Dec 17, 2017

### willem2

You've exchanged the emission factors from oil, coal and gas.
You don't use the right way to calculate the average annual percentage growth.
If you have an annual growth of p percent, and initial emission $E_i$ the emission in 26 years will be:
$$E_i (1+\frac {p} {100})^{26}$$

Can you find p from that?