If his savings account does not have any more money added to it and the bank takes their interest, he wouldve lost 165 dollars and have 385 left in his account
$385 was left in his account you find this by Finding 3% of $550 you do this by multiplication 3% * 550 = 16.5 this gives you the unit rate of $16.50 interest each year then you multiply $16.50 by 10 to find how much it is for 10 years you get $165 for 10 years next you just subtract the original amount by $165 the interest over 10 years to get your answer $385