Of the recent customers at West Coast Dogs, 30 wanted mustard on their hot dogs and 10 did not. Considering this data, how many of the next 76 customers would you expect to want mustard? customers

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?