Help please!! I'm trying to solve this question but I can't seem to find the length of one side properly, that said, I'm unable to evaluate the whole question as finding the length of one side seems complicated for me right now. And if you guys find something wrong with the number, do let me know.

In a gallup poll, 750 randomly selected adults were asked whether they are in favor of the death penalty for a person convicted of murder, and 75% of them said that they were in favor. construct and interpret a 99% confidence interval of the percentage of all adults who are in favor of this death penalty. round to 2 decimals.