The Law Posted November 11, 2009 Report Share Posted November 11, 2009 I can't remember how to do this easy calculation. Can someone please explain to me how to do square roots efficiently for the MCAT... i.e. explain to me how to do basic math! Sq root. 1.6 x 10^-9 Link to comment Share on other sites More sharing options...
Madz25 Posted November 11, 2009 Report Share Posted November 11, 2009 I can't remember how to do this easy calculation. Can someone please explain to me how to do square roots efficiently for the MCAT... i.e. explain to me how to do basic math! Sq root. 1.6 x 10^-9 change to: sqrt (16 x 10^-10) = 4 x 10^-5 sqrt the coefficient (16 in this question). divide by 2 for exponents when doing sqrt fixed - thanks addy k Link to comment Share on other sites More sharing options...
Addy K Posted November 11, 2009 Report Share Posted November 11, 2009 1.6 = coefficient and 10 = base I drilled into my head that you divide the exponent by 2 and take the square root of the coefficient. I even think I made a mnemonic because I kept forgetting lol Link to comment Share on other sites More sharing options...
The Law Posted November 12, 2009 Author Report Share Posted November 12, 2009 Thanks Addy!!! Link to comment Share on other sites More sharing options...
rmorelan Posted November 12, 2009 Report Share Posted November 12, 2009 change to: sqrt (16 x 10^-10) = 4 x 10^-5 sqrt the coefficient (16 in this question). divide by 2 for exponents when doing sqrt fixed - thanks addy k Excellent I often do that sort of decimal shifting as well (ie 1.6 to 16 by substracting one from the exponent) to make things easier. Link to comment Share on other sites More sharing options...
The Law Posted November 12, 2009 Author Report Share Posted November 12, 2009 Lol... 15 mins later... Madz25 says: *lol *OMFG *ur a ****ing JERK *thats it *LAWRENCE *this right here *points between lawrence and madz* is OVER *i dont wanna be friends with someone that cant do basic math anyway Link to comment Share on other sites More sharing options...
Madz25 Posted November 12, 2009 Report Share Posted November 12, 2009 Excellent I often do that sort of decimal shifting as well (ie 1.6 to 16 by substracting one from the exponent) to make things easier. thanks rmorelan. at least someone appreciates. Link to comment Share on other sites More sharing options...
The Law Posted November 12, 2009 Author Report Share Posted November 12, 2009 thanks rmorelan. at least someone appreciates Is it not enough that I started a cult in your honour?!?! Edit: or that I, along with Mikeyo, grind you mentally.... hahah Edit2: Madz has informed me she refuses to reply to my last post Link to comment Share on other sites More sharing options...
Octavius Posted November 21, 2009 Report Share Posted November 21, 2009 MCAT always uses smooth round numbers =) You can always reason as well, whether something is too high or too low or what direction should the number be from a reference point (i.e. pH calculations) Link to comment Share on other sites More sharing options...
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