How much sooner does the box reach the bottom of the incline than the disk? express your answer in terms of some or all of the variables m, h, ?, and r, as well as the acceleration due to gravity g?

None of those are technically correct. 9.7 x 104 is actually 1,008.8, but if that answer was a choice, it would be that one. if you meant 9.7 times maybe a thousand or more or divided by 10 or more, than the answer choices would be correct, but other than that, they actually arent.