Write in expanded form.
472,569.21
a. (4x100,000)+(7x10,000)+(2x1000)+(5x10)+(6x1)+(2x1/100)
b. (4x100,000)+(7x10,000)+(2x1000)+(5x100)+(6x10)+(9x1)+(2x1/10)+(1x1/100)
c. (4x10,000)+(7x1000)+(5x100)+(6x10)+(9x1)+(2x1/10)+(1x1/100)
d. 400,000+70,000+2,000+500+60+9+20+1