If strep bacteria causes the infection, it can remain contagious for up to 2 weeks without treatment. However, antibiotics can shorten the contagious period and li â¦ mits to about 24 to 48 hours once the therapy starts.     http://health.top54u.com/post/How-Long-is-Tonsillitis-Contagious.aspx.
Calculate Options Implied Volatility in Excel. Implied Volatility Function: Returns the annualized volatility of an underlying security implied by the market price of a European call or put option on that security, based on Black-Scholes valuation. Description of parameters.
1 Excel's DATEDIF Function If you regularly work with dates and times in Excel, then it is worth learning how some of Excel's date-related functions operate. 2  There are over 20 functions in this group, â¦. 3  How to Quickly Sum a Column in Excel SUM is one of the commonly used functions in Excel. One of the most useful functions in Excel is the IF function. What it does is test a value in a specific cell to see if that value meets a certain condition. If the valu â¦ e does meet the condition, one result will happen, if false, a different action will occur.