Consider the function LaTeX: f\left(x\right)=0.3x^2-2x+6f ( x ) = 0.3 x 2 − 2 x + 6. Calculate the Average Rate of Change over the interval [ -2. -1]. Round your answer to the nearest tenth.

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?