# Dose calculations in FA (b/c I'm a *******)

Discussion in 'Step I' started by Taus, Mar 23, 2007.

1. ### Taus . Moderator

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OK..I'm a ******* and have a pretty basic question..

On page 210 they have the formula for calculating loading dose as: Cp x Vd / f

Is it (Cp x Vd) / f or Cp x (Vd/f) ?

I remember the "PEMDAS" mnemonic from highschool and think its the first way w/ multiplying first....but I'd appreciate if someone could chime in on this.

3. ### surprisedgirl

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i believe its the first

4. ### domer621 MS4

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surprisedgirl is correct.

5. ### Taus . Moderator

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hmm...taking a look at some practice questions Qbook has it the 2nd way and Katzung in the Lange Qbook has it the first way....wtf...

6. ### surprisedgirl

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i havent studied that stuff nor have i looke dat it since last year but im pretty sure thats how i remember it.....and that seems right anyway

7. ### mountainman123 Guest

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Yeah I remember trying to figure that out and they both give the same answer if you plug in fake numbers and solve (I think...... too lazy to do it right now)

8. ### lord_jeebus 和魂洋才 Moderator Physician

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Either

9. ### Taus . Moderator

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thanks

10. ### joe6102 by the power of grayskull

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Yes.

11. ### SeventhSon SIMMER DOWN

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it so happens for that expression a x b / c the order of operations is irrelevant

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