Ena found the greatest common factor (gcf) of 24ab2c3 and 30a2b3c2 to be 6abc2 by using these steps: step 1: gcf of 24 and 30 is 6 step 2: highest shared power between a and a2 is a step 3: highest shared power between b2 and b3 is b step 4: highest shared power between c3 and c2 is c2 in which step did lena make a mistake?

The length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?