Help with translating an equation

[LordTootToot]

Hello,
I have attached an equation that I need help writing out. For some reason when I tried to paste the equation into other calculators to find y when x is 2774 it returned 19 or the graph was wrong. I was able to find an accurate graph (posted below) however when I tried to copy and paste the formula into other programs it would not work. I am very confused.

7.2E+08e^-6.46E-03x

2774 (x value) should return 11.82 or close to it.

 

[lev888]

08?

 

[lev888]

evaluate y=7.2e+08e^(-0.00646x) at x=2774 - Wolfram|Alpha

Wolfram|Alpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.

www.wolframalpha.com

 

[Harry_the_cat]

I would write the 7.2e+08 as 7.8x10^8. The two e's mean 2 different things.

You are getting 19 because it is reading it as (7.2 x e) + 8 x e^(-0.00646 x 2774) = 19.57 approx.

 

[Dr.Peterson]

Hello,
I have attached an equation that I need help writing out. For some reason when I tried to paste the equation into other calculators to find y when x is 2774 it returned 19 or the graph was wrong. I was able to find an accurate graph (posted below) however when I tried to copy and paste the formula into other programs it would not work. I am very confused.

7.2E+08e^-6.46E-03x

2774 (x value) should return 11.82 or close to it.
View attachment 28314

When you use any program, you need to communicate with it on its terms. Some understand "3e+03" notation, and others don't.

Here is a graph in Desmos:


I entered the equation as:

I also had to adjust the window in order for it to show anything. Others may do that automatically.