Answer:
Step-by-step explanation:
I=Prt
11.25=A(0.03)(15/12)
11.25=A(0.0375)
A=11.25/(0.0375)
A=$300
25=B(0.05)(15/12)
25=B(0.0625)
B=25/(0.0625)
B=$400
So account B has the greater principal.
To find the width of her backyard, you will first take the total amount and divide by $15 to give us the total number feet represented by the perimeter.
Then you will use the formula for finding perimeter of a rectangle to find the missing width.
Please see the attached picture for the work.
The width is 12 feet.
Hand writing is bad sorry, but I hope that helped.