Given the function
f(x) = -3x2 +5x -2,
what is the value of
f(4)?

We just started the introduction into circles and i have no idea how to do this.

: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?

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?