Answer: (0.760, 0.820)
Step-by-step explanation:
Denote p as the proportion of adults in California who believe that "education and our schools" are among the foremost concerns in the state.
Given: 79% (actual results indicate 400 out of 506 surveyed) of adults in California consider "education and our schools" one of the main issues currently facing the state.
In other words, sample size: n= 506
Sample proportion: 
Critical value for a 90% confidence interval (Using z-value table):

Now, the confidence interval for the population proportion at 90% will be:

In other words, 
In summary, 

Thus, the 90% confidence interval for the population proportion= (0.760, 0.820)
Answer:

Step-by-step explanation:
Let m denote the number of minutes required to download the entire game.
The computer downloads at a speed of 0.01 GB per minute, and since half a gigabyte has already been downloaded, we can express this as 0.01*m + 0.5 equaling 2.2, as the game's total size is 2.2 GB.
We will determine the minimum number of minutes necessary to completely download the game.



Thus,
represents our sought inequality.