1. 
, which implies that the sides could be 
and 
. (There are theoretically an infinite number of side-lengths, though--in general, for any polynomial or reciprocal of a polynomial 
, 
and 
is valid. However, the set provided makes the most sense.)
2. Profit is the difference between cost and revenue. For revenue,
, so revenue equals 
, so profit equals 
2. Profit is the difference between cost and revenue. For revenue,