The president of Kramerica Industries that manufactures rubber bladders for oils tankers, thinks that the function P(b)=-2b^2+14b-20 represents the company’s profit, where “b” is the number of bladders

Question

produced in thousands, and “P(b)” represents the company’s profit in hundreds of thousands of dollars.
Determine the number of bladders the company must produce to breakeven

Answer 1

breakeven is when profit is zero, right?
So just solve
-2b^2+14b-20 = 0
or
b^2 - 7b + 10 = 0
(b-2)(b-5) = 0
...