If p(a) contain 8 elements then set a contain which element

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

Cal's go cart has a gas tank with the dimensions shown below. he uses a gas can that holds 11 gallon of gas, to fill the go cart tank. 11 gallon = 231 inches^3 how many full gas cans will it take to fill the go cart's gas tank?

What are the excluded values? m+5/mn+3m