F(x)= x2
.
What is f(x) + f(x) + f(x)?

(f(x))
f(x) + 3
[3f(x)

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?