The unit cost, in dollars, to produce tubs of ice cream is $9 and the fixed cost is $13172. The revenue function, in dollars, is R(x)= -2x^2+439x Find the profit function.
P(x)=

M∠abc=138° and m∠def=31° . which statement is true about ∠abc and ∠def ? a: the angles are neither complementary nor supplementary. b: the angles are complementary. c: the angles are supplementary.