The rate of 14 inches per every 2 minutes would equal 30 two-minute intervals as 60 minutes (an hour)/2 minutes = 30. 14 x 30 = 420 inches in one hour, which reduces to 35 feet since 420inches/12 inches (one foot) = 35.
x is the hypotenuse so it means the other ones that are adjacent and opposite and you're looking for the hypotenuse so you can do c Square equals to a square + b square