profit Mo Kofi tola a machine and made a of 15% .The buyer later sold it to Mr Nana at low of 10%. If Mr Nana paid GH¢ 20. 70000 for the machine how much did Mr Kofi buy it?

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.