Find the distance between the points (2,4) and (8,4)

Which of those sequences is a geometric sequence

What are the soultion(s) to the quadratic equation 40- x^2=0

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