Alice has 20 quarters. She wants to exchange them for nickels and so she goes to the bank. After getting back from the bank, she discovers that 20% of the nickels are iron nickels worth $3 each. What is the total value of her money now?
A quarter is worth five nickels because .25 / .05 = <T>divide(0.25, 0.05)=5.0
She gets 100 nickels from the bank because 20 x 5 = <T>multiply(20, 5)=100
20 of the nickels are iron nickels because 100 x .20 = <T>multiply(100, 0.2)=20.0
80 of the nickels are regular because 100 - 20 = <T>subtract(100, 20)=80
The iron nickels are worth $60 because 20 x 3 = <T>multiply(20, 3)=60
The regular nickels are worth $4 because 80 x .05 = <T>multiply(80, 0.05)=4.0
Her money is now worth $64 because 60 + 4 = <T>add(60, 4)=64
