Premise: "Girl with half dreadlocks and earmuffs on makes a large bubble."
Hypothesis: "The bubble is 20 ft tall."
Do we know that the hypothesis entailed by the premise? Now, let's be accurate as possible. Some thinking first:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
The fact that the bubble is large doesn't necessarily imply that it is 20 ft tall. So, the answer is it is not possible to tell.