If the zeros to your quadratic function are x=6 and x=-1, which of the following is the correct factored form of the quadratic funciton? f(x)=(x-6)(x-1)

f(x)=(x+6)(x-1)

f(x)=(x-6)(x+1)

f(x)=(x+6)(x+1)

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?