What is the value of c such that: x2 - 14x + c, is a perfect-square trinomial?

The trigonometric ratios sine and secant are reciprocals of each other

Ms. ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms. ortiz charge per kilogram of tomatoes to make on a load of tomatoes?

What is the volume of this container?