Two brothers, Mark and Walter, each inherit $19000. Mark invests his inheritance in a savings account with an annual return of 2.6%, while Walter invests his inheritance in a CD paying 5.5% annually. How much more money than Mark does Walter have after 1 year?

Mark's money after a year = $19000 + 2.6% of $19000 * 1

= $19000 + (2.6/100) * $19000

= $19000 + 2.6 * $190

= $19000 + $494

= $19494

Walter's money after a year = $19000 + 5.5% of $19000 * 1

= $19000 + (5.5/100) * $19000

= $19000 + 5.5 * $190

= $19000 + $1045

= $20045

Difference between their money = $20045 - $19494

= $551

Therefore, Walter has $551 more than Mark