Find the new amount given the original amount and the percent of change. 28 members; 50% increase

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.

Which of the following is the result of expanding the series

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?