Answer:
Kelsey has $643.2 in her account
Step-by-step explanation:
1.2% of 600 is 7.2
meaning, $7.2 are added to his account each year.
to find how much money he has after 6 years, multiple 7.2 ($) by 6 (years).
which is equal to 43.2
600 plus 43.2 is 643.2