Select the angle that correctly completes the law of cosines for this triangle 12^2 + 13^2 - 2(12)(13)cos __ = 5^2

Acertain company's main source of income is a mobile app. the company's 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)p(x)=−2(x−3)(x−11) which app prices will result in \$0$0 annual profit? enter the lower price first.