a day trader buys an option on a stock that will return $ profit if the stock goes up today and lose $ if it goes down. if the trader thinks there is a % chance that the stock will go up, find the standard deviation of the day trader's option value.

The smokey mountains have over 2,100 miles of rushing mountain streams and rivers that flow through the park. in each mile lives a diverse community of native fish, amphibians, insects, and larvae, some of which are found only in the southern appalachians. park managers and scientific researchers test many factors such as fish populations, the watersheds and water tests to determine a) too many lizards are present b) the water quality of the stream c) rainwater is running into local streams d) if visitors to the park are overstaying their welcome