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wait isnt \((1/2)(8 sqrt2)(8sqrt2) = 1/2(128)= 64\)

Wait... if this isn't a homework forum... and this isn't a chatting forum... then what type of forum is this? I agree with you that it's annoying that people are saying ASAP, Begging, HELP, DUE TOMMOROW etc etc, but like @Auxiarc said above me, there are some people out there who ACTUALLY want to learn and grow as a learner, so they come here to post questions that they have.

Also, with your list of words, I don't think "Help" should be on them... since people who need help, say Help in their title... to receive help. Though I agree with all of the other words such as ASAP and Begging and etc etc.

Sumfor(n, 1, 10000, (n^3 / 3^n)) = 33 / 8

82 should be the denominator.

hm.. wait a minute! EP is correct... what did CPhill do wrong???

P price reduced from  $ 82 to  $ 30         82-30 = $ 52  off

 52 is what percentage of  82?

52/82  x 100% =  63.4 %  reduction   rounded  = 63% off

Is this correct?

ok I get it now thank you!

Glad I could help, even though it was mostly CPhill :D

I tried rewriting the bases as powers of three.

Then, I tried diving by three and multiplying the series by three

but it did not work.

27/27 looks very fishy, might be the key to the problem.

Thank you very much this was very helpful for my maths homework ok bye

CPhill! Wow!!! You beat me to it! LOL nice job :D

%  reduction = 

(  [ Old Price  - New Price  ]  / [ Old Price]  x 100  )  %   =

( [ 80 - 32 ]  / [ 80 ] x 100 ) %  =

( 48/80  x 100)%  =

(  3/5 x 100)%  =

(.60 x 100)%  =

60 %

thank you but i kinda need it as a percentage thanks a lot anyways

82-30=52.

52/82 will be our answer :D

Hope this helped!

The largest power of 3 that divides 20! is 3^8. 

There are 18 powers of 2 and 8 powers of 3 in 20! (prime factorization)

We want the largest value of n such that 2n is less than or equal to 18.

That means n is less than or equal to 8, so 8 is our answer.

Hope this helped!

7v/12+10=3

Multiply all by 12.

7v+120=36

Move over.....

7v=-84

v=-12

Hope this helped!

7v/12   + 10 = 3     subtract 10 from both sides of the equation

7v/12 = -7             multiply both sides by 12

7v   =   -84           divide both sides by 7

v  =   -12

Awesome, CPhill!

I'll  buy  that, geno    !!!!

Did  you find this mathematically  or by "trial and error???"

Y

X                Z

Mmmm.....let's see

YZ  = 100

If the tan Z = 7

This indicates  that    XY / XZ =   7

So    this implies that    XY =  7XZ  ⇒   XY/7  = XZ

So....using the Pythagorean Theorem we know that

YZ  = √  [ XY^2  + XZ^2]        subbing, we have  that

100   = √ [ XY^2  + (XY/7)^2 ]    simplify

100 = √  [XY^2  +  XY^2 / 49 ]

100  =  √ [ 49XY^2 + XY^2 ]   / 7        multiply both sides  by 7

700 = √]50 XY^2]      square both sides

490000 = 50 XY^2     divide both sides by  50

9800 =  XY^2     take the positive root

XY =  √9800  = √[4900 * 2  ] =  70√​2

I believe Cal took their explanation from the best answer on this website, it may help you understand the context:

https://stats.stackexchange.com/questions/193554/problem-understanding-the-following-probability-problem

Impressive, Chris!