Kennedy is making a flower crown for her dog. She is covering a 90 degree section of the crown with fabric, what length of fabric will Kennedy need in order to cover this section of the crown if the diameter is 15 cm

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