What is the mean of the following set of data? round your answer to two decimal places.
3.4, 5.6, 1.2, 3.4, 9.0, 5.6, 7.8

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?