HELP

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

When only separate discreet points are graphed it is called?

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