What is the solution to 3 times the square root of 4 minus 2 times the square root of 4? a. 0 b. 1 c. 2 d. 3

I'm terrible at math any here is appreciated.

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

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?