Exponents... wth?

[420skeptic]

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[mcatstuff19]

10^4 * 10^-8/10^7 = 10^-4/10^7 = 10^3

Multiply -> add exponents
Divide -> subtract exponents

 

[420skeptic]

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[mcatstuff19]

Doh. Yeah you're right. EK is wrong, you're right.

Here's a link to help refresh your exponent math: http://www.mathsisfun.com/algebra/exponent-laws.html

 

[420skeptic]

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[mcatstuff19]

Apparently EK has a several mistakes in each of their books. Link to their book errata thread in their forums (not sure how we'll they're maintained though).

https://www.examkrackers.com/MCAT/Forum/Forum.aspx?f=155

Good luck!