Answer: 0.76
Step-by-step explanation:
We know that the sample proportion is the best estimate of the population proportion. (1)
Given : Gallup reported that of the 1,005 people surveyed, 76% of U.S. workers believe that they will continue working past retirement age.
Let p be the population proportion.
We have sample proportion: 
Therefore, the estimated proportion of U.S. workers believe that they will continue working past retirement age from the sample = 
I believe the answer is 8 2/6 witch would rescue to 8 1/3 . Ok I'm not 100% positive but that look about right. Sorry if it is wrong.
If its (1/5)^4
625-3x=625
-3x=0
x=0
If its 1/5^4 then the answer is 390624/1975
I'm betting its (1/5)^4
Order of operations matters