Find the area of a rectangular garden box if the length is square root of 6ft. and the width is square root of 21 ft. write the answer in simplest radical form.

2. there is a threshold on a person's weight that tells doctors when a person is at a greater risk of death. in men, ages 40 - 49, that threshold weight is represented by h=12.3 squared 3 square root of t, where h is height in inches and t is the threshold weight. if a doctor told a 43 year old man that his threshold weight was 218 lbs what would that man's height be (in the form of feet -inches: ex: 5 ft 9 in)?