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
Answer:about 2 1/4 weeks
Step-by-step explanation:
You find the unit rate of the books by dividing the number of books by the that price, and for this example the answer should be $.75 per book
Formular is (principal *time*rate )/100 +principal
so applying that we have( 2000*5*7) +2000 which gives 2700 dollarss