About what percent of gyms in shanesville have fewer than 56 gym members

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.

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Find the area of the triangle shown 3 by 6