Write this number in expanded form 325,809

Could someone with number 1 and 2

Ebuka's monthly rent is $750. if ebuka pays the rent late, his landlord charges 4% interest per week that the payment is late. write a function that gives the total cost r(t), in dollars, of ebuka's rent if he pays it t weeks late.

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?