The formula for centripetal acceleration, a, is given by this formula, where v is the velocity of the object and is the object's distance from the center of the circular path:
a
Solve the formula for r.

1 tote= $33
Rent = $265

265/33= 8.03 (but Miss Roja has to sell WHOLE totes)
8*33= $264
9*33= $297

To make rent Miss Roja will have to sell 9 totes. If Miss Roja only sells 8 totes she will make $264, which is not enough to cover rent. Therefore she must sell 9 totes. She will make $297, which is enough to cover rent.