What is 5n to 3rd Polynomial number of terms

Which statements regarding the diagram are true? check all that apply.

The graph shown is the graph of which function?

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax