What are the coordinates of the image after a dilation with centre at the origin and scale factor of two

What’s the domain of this function? fast

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)?

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.