to txuser: As far as I can tell, for Bahamas one neeeds a tourist visa. For Mexico - as long as the cruise is not more than 3 days, one does not need any visa (anyone in the world does not need a Mexico visa for a cruise upto 3 days). For entering back in US, either you can enter on a stamped visa or on AP. Pls check as well.
Discriminant of a Quadratic. The number D = b2 â 4ac determined from the coefficients of the equation ax2 + bx + c = 0. The discriminant reveals what type of roots the equation has. Note: b2 â 4ac comes from the quadratic formula.
The formula for the Beta of an asset is. The Î² coefficient measures the asset's non-diversifiable risk, also called systematic risk or market risk, rm measures the rate of return of the market and ra measures the rate of return of the asset. On an individual asset level, measuring beta can give clues to volatility and liquidity in the marketplace.