How many tens are there in 90,000?

An 18% discount on a watch saved a shopper $72. find the price of the watch before the discount

Emily convinced her mom to buy a giant box of her favorite cereal. her mom doesn't think the box will fit on their shelf. the volume of the box is 1000 cm^3 . the base of the box is 25 cm by 10 cm

Need answer asap (see image) (20 points)