Stock A has an expected return of 5%, and a standard deviation of returns of 10%. Stock B has an expected return of 15% and a standard deviation of returns of 20%. The correlation between the two stocks returns in 1.00. The standard deviation of an equally-weighted portfolio comprised of the two stocks will be:

Aproperty title search firm is contemplating using online software to increase its search productivity. currently an average of 40 minutes is needed to do a title search. the researcher cost is $2 per minute. clients are charged a fee of $400. company a's software would reduce the average search time by 10 minutes, at a cost of $3.50 per search. company b's software would reduce the average search time by 12 minutes at a cost of $3.60 per search. which option would have the higher productivity in terms of revenue per dollar of input?