Asap a right rectangular prism has a length of 8 ft, width of 814 ft, and height of 412 ft. what is the volume of the prism

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

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height

Free points also plz look my profile and answer really stuff