Based on a sample of 30 randomly selected years, a 90% confidence interval for the mean annual precipitation (in inches) in one city is (48.7, 51.3). find the margin of error.

In stepmber, daniel and justin opened a business. during their first three months of business, their average monthly profit was $51. if during their first month, they lost $29, and during their second month, they gained $115, what was their profit or loss for their third plzzz i will give you 299 points