Recent content by sk381

a^(1/(2)^1/2)) that is a raised to the power 1/underroot(2)

Right, in that case, we should have 2^9C2 ways of doing this.. which is (2^9*(2^9)-1)/2! but the answer doesn't mention the 2! Am I missing something??

Followup: Suppose we have 2^9 ways of choosing topics on a pizza. Then, if we want different topics on 3 pizzas, we can do that in 2^9C3 = (2^9*(2^9)-1*(2^9)-2)/3! and if we want the same toppings on all the 3 pizzas, we already know that we can do that in 2^9 ways. But what about the...

For example: for 3 toppings, ABC the possible subsets would be: A,B,C,AB,AC,BC,ABC..and the final one is no topping at all.. making it 2^3=8 choices. Is that correct?

My friend says that : If there are 9 different toppings then the number of ways to choose toppings for one pizza is 2^9, the number of the possible subsets of the set of 9 toppings. How can this be? Could someone explain with an example? Sorry if this seems very trivial...

sorry.. didn't look at the most obvious choice.. ABC!

Another related question.. Say I have 3 items A,B,C and I wish to select 3 at a time (order does not matter and an object can be chosen more than once)... using the forumla for Combination with repetition, I should have (3+3-1)!/3!*2!=10 combinations If I list all the possible...

Arby's has this deal out now: 5 for $5.95. You can pick from 8 choices to fill 5 spots. The menu says "over 790 possible combinations" , so one can assume that the number of choices is between 790 and 800. What is the equation to figure out how many choices you have and what is the exact number...

re : Derivation of the formula for temp. conversion I mean, how does one arrive at this: Tc = (5/9)*(Tf-32) or what do you mean by "It is just the ratio of the increments minus the difference between starting points." I know it might be very trivial but I'm just having a hard time...

Can some one point me to or explain in simple terms, the derivation of the formula to convert celcius into fahrenheit? Thanks!

Why are the atomic weights of elements not integers and how many grams would there be in 1 amu (atomic mass unit) of a material? I know these are trivial questions but it's been a long time since I left school! Thanks. -SK

Ok... but then how do we arrive at the conclusion that 1 dB = 0.1 Bell

Hmm.. not clear yet... I didn't get it.. Can you give some example to further elucidate?

I know that 1 Bel = Log (Power1/Power2) and 1 decibel = 0.1 bel then why is 1 decibel = 10 Log (Power1/Power2) and not 0.1 Log (Power1/Power2) Thanks SK

Is there any link that you can suggest where I can learn how to make these using excel etc.. and also the theory behind them.. Also since the graphs themselves are so small, are these bars conveying any real information except giving a qualitative feel foe the amount or error.. sort of like the...