Please tell me the answer will give 100 points

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)?

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

What is the radius of the cone in the diagram? round your answer to the nearest whole number