PDA

View Full Version : quick question on calculations



ighettoboyi
12-14-2004, 01:32 AM
i know that

Lv = Av*1.84*10^8/[Vb*1728*(Fb/0.159)^2] - 0.823*sqrt(Av)

but does that mean (Av*1.84*10^8) or Av*1.85*[(10^8)/(Vb*1728*(Fb/0.159)^2)] or are they the same?? (sorry i'm kinda out of it and i'm rusty on my order of operations lol)

Nikuk
12-14-2004, 10:48 AM
BEDMAS ...

Step 1 - Brackets
Step 2 - Exponents and Roots
Step 3 - Division and Multiplication
Step 4 - Addition and Subtraction

wow... I havent heard that in such a long time... LOL

JoseMCeee
12-14-2004, 03:29 PM
mine was PEMDAS
Please excuse my dear aunt sally

or
Parantheses exponents multplication division add subtract

Nikuk
12-14-2004, 03:32 PM
yeg'xactly... bout 17 years... LoL

sumone
12-14-2004, 04:18 PM
(Av*1.84*10^8) or Av*1.85*[(10^8)/(Vb*1728*(Fb/0.159)^2)]

those aren't the same (1.84 & 1.85)...off by10^6...

you're saying is:
(A * B * C)/D

the same as

A * B * C/D

answer is yes...

ex:

if A=1, B=2, C=3, D=4,
(1 * 2 * 3)/4 = 6/4 = 3/2 = 1.5
(1 * 2 * 3/4) = 2 *.75 = 1.5

sumone
12-14-2004, 04:37 PM
also, when you divide by a number, you invert & multiply

so (A * B * C) / D =

A * B * C * 1/D

so you can say A/D or B/D or C/D times all the rest..

bcarpenterfhl
12-14-2004, 10:58 PM
yea PEMDAS is way cooler. same thing but you remember by "Please Excuse My Dear Aunt Sally".

Parenthesis
Exponent
Multiplication
Diviosion
Addition
Subtraction

shout out to seventh grade math teacher mrs. newman

JoseMCeee
12-14-2004, 11:16 PM
Theres another thing for that pemdas. I forgot how it goes tho. I think its please something mc donalds blah blah. i forgot

sumone
12-14-2004, 11:57 PM
I don't think OoO is the issue here....