500 because when you have dm multply it
Alright, lets gets started.
I suppose , we are asked to find simple interest for above question.
Principal P = $1,250
Rate r = 5.7 %
Time t = 4 years
The formula for simple interest = 
Hence simple interest 
Simple interest 
Simple interest = 285 $
Hence interest earned is $ 285. : Answer
Hope it will help :)
The ratio from length to width is 6:3. You can simplify it to 2:1 (dividing each by 3)