Answer:
I can't see the whole question.
i think that it is 1 yard because they are 1 apart
Write this as an equation and solve

The number is 30
Answer:
well you answered the question in your question: you have Area = 136 square units. How you got it, you need to be more specific. Maybe it's because the side lengths are 2 * 68 for example. If anything provide more info. tried to help the best I can
Step-by-step explanation:
If 121 - a = 0, then a is equal to 121. Basically, it's 121 - 121, which equals 0!