Cindy has started running. On the first day, she ran 1,230 feet before having to stop and walk. On the second day, she ran 470 yards before stopping to walk. On the third day, she ran 1 ¼ miles before stopping to walk.

this is false ^.^ lol

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.