KAlgebra/Credit payment

Formula for calculating compound interest:

Where,

A = final amountBR

P = principal amount (initial investment)

r = annual nominal interest rate (as a decimal)

n = number of times the interest is compounded per year

t = number of years

Write all these functions in Console Mode

1.This Function calculates the monthly interest rate by given yearly interest rate.

monthlyInterestRate:= yearlyInterestRate-> x/1200

2.Write this Function in the console mode.It calculates the monthly payment you have to return to the bank

monthly_payment:=(sum, mir, months)->(sum*mir^months*(mir-1))/(mir^months-1))

3.Write this Function in the console mode.It calculate the whole sum you have to return to the bank

sum:=(monthlyPayment,months)->monthlyPayment*months