He estimates that he will stand 6 feet 9 inches tall when he is 20 years old. His prediction is correct.
Given: Growth per year = 3 inches
Height at 15 yrs of age = 5'6''
Height at 20 yrs of age = 6'9''(predicted)
We know that Jesse grows 3 inches every year.
In 5 years(15yrs - 20yrs) his growth = 5 × 3 = 15 inches.
At 15 years(present) height = 5'6''
At 20 years (future) height = 5'6'' + 15'' = 6'9'' (since, 1ft = 12 inches)
Thus, Jesse's prediction is correct
To learn more about feet and inches, refer to:
https://brainly.com/question/8019254
#SPJ4