The length of a rectangle is three times the width. the sum of the lenth and the width is 24 intches. what is the length of the rectangle

The length is 18 inches.
the width is 6.
6 times 3 is 18.
18+6=24 inches.

The answer is c because you turn 17.5% into a decimal which gives you .175 then you times that by $361.35 which gives you 63.23625 but then you round that which gives you 63.24. then you at 63.24 pulse 361.35 and you round it which gives you $425