Which of the following are the correct answers?

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)?

X-10/4 when x = –18 a 7 b –2 c –7 d 2

What is the area of the shaded sector?