Math question

[md2be89]

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Can someone help me out with the math here? For the life of me I can't understand why they get e^6 I kept thinking it would be 7200. I hope this attachment goes through. Doing this on my phone. Thanks!!!

 

[chiddler]

i think it's a mistake

 

[Dasypus]

2*9*4=72. 10^9 * 10^-6 * (10^--1)^2 (that last works out to 10^2 because it's dividing by 10^-1 squared)

9-6+2=11-6=5 72*10^5 = 7.2*10^6.

Chidder, you forgot your square in the bottom.

 

[chiddler]

oh. missed the squared.

 

[md2be89]

Ahh makes sense. Thanks so much for waking me through it!!