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# Zen

• ### windows update dns cache?

Hi

How long does it takes for windows to update it's DNS cache without us flushing the DNS cache?

Thanks

1 AnswerComputer Networking9 years ago
• ### Calculate income for tithe?

Hi guys

I have a business that generates 20k in revenue. Cost of goods are 15k, thats leave me 5k profit, but I still have to pay lease for my store, electricity bills, phone bills and employee around 3k, those are operational expenses not my own house phone bills and so on. How did I calculate my tithe?

Is the 10% tithe taken from revenue (20k) minus cost of goods (15) and then subtracted by operational expenses (3k)?

Or revenue (20k) minus cost of goods (15k)?

Thank you very much for your time.

• ### calculating normal distribution in option pricing model?

Assume that:

StockPrice (S): 100

StrikePrice (X): 95

TimeToExp(t) : in 3 months time, equivalent to 0.25;

StandardDeviation(v): 50%

InterestRate (r): 10%

--------------------------------------------------------------------

So, to calculate the call theoretical value using black-scholes model is:

S * N(d1) - (X * (1 - (r * t))) * N(d2)

-or-

100 * N(0.43) - (95 * (1 - (0.10 * 0.25))) * N(0.18) = \$13.71

My question is how to calculate the normal distribution value which in this example will yield:

N(0.43) = 0.6664

N(0.18) = 0.5714

If we fill in the given value above to replace N(0.43) and N(0.18), we will get \$13.71. But how do we get that 0.6664 and 0.5714?

Thanks

• ### Will a reverse stock split add risk to my options position?

For example: a company announced a 1:6 reverse split. Let's say I have a bull call spread for a debit of \$1 and thus I have a total risk of \$100 per contract. Does it mean that after reverse stock split, my risk will turns out to be \$6 which is \$600 per contract?

• ### Calculating Dow 30 index?

Hi Guys

How does DowJones calculate index price? I know it isn't market cap weighed like S&P500. But how do they do it? Let's say, one day all 30 component stocks traded at \$30.00, how much will the Dow30 be?

• ### How does a high inflation rate affect banking revenues?

U.S had been spending money lavishly recently. Continuing pumping more cash into the financial system. This will result in higher inflation. The question is: Will a high inflation rate affect U.S banking revenue, how?

• ### Which broker allows leveraged options trading?

Does anyone know which online broker allows leveraged options trading?

Thanks

• ### Multi PCDs Alloy Wheel?

I own a Jaguar iForged 20" alloy wheel and would like to use it on my all new Honda Accord. But it doesn't fit since both car has different PCD.

One of alloy wheel supplier in my town suggest me to add more holes to make it dual PCD. So that it can fit in both car.

What I'm concern about is whether will it be safe for me to add holes and make it dual PCD on a single wheel?

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