Answer

Michael saves 428$ a month for college.

How much money will he have saved after 4 years?

To resolve this word problem we first need to know that

every year has 12 months, so if Michael save 428 en one month in a year he will save:

12 x 428 = 5136$

428

x  12

   856

+4280

 5136

so in one year he saved 5136$, in 4 years how much he will have saved?

4years x 5136$ = 4 x 5136 = 20544$

5136

x   4

20544