Please help! I’m begging you. Give the answers!

How do you find the circumfrance of a circle?

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x

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?