Answer:
At price 3 and 11, the profit will be $0 
Step-by-step explanation:
I think your question is missed of key information, allow me to add in and hope it will fit the original one.  
<em>
A certain companies main source of income is a mobile app. The companies annual profit (in millions of dollars) as a function of the app’s price (in dollars) is modeled by P(x)=-2(x-3)(x-11) which app prices will result in $0 annual profit?</em>
My answer: 
Given: 
- x is the app price
- P(x) is the profit earned 
If we want to find out the app price that will result in $0 annual profit? It means we need to set the function: 
P(x)=-2(x-3)(x-11) = 0 
<=> (x-3)(x-11)= 0 
<=> x - 3 = 0 or x - 11=0 
<=> x = 3 or x = 11 
So at price 3 and 11, the profit will be $0 
Hope it will find you well.