Answer:



Step-by-step explanation:
For this case we have a confidence interval given as a percent:

If we express this in terms of fraction we have this:

We know that the confidence interval for the true proportion is given by:

And thats equivalent to:

We can estimate the estimated proportion like this:

And the margin of error can be estimaed using the fact that the confidence interval is symmetrical

And then the confidence interval in the form desired is:

Answer:
2x+15=145........ vertically Opposite
2x=145-15
2x=130
x=130/2
65
x=65
Answer:
its 400 c
Step-by-step explanation:
because it is