In the triangle below, what is the tangent of 60?

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

Astudent simplified a rational expression as shown.

What would the rule be for the reflection of y=-3