Write the equation for a parabola with a focus at (0,5) and a directrix at x = -7

Mary had at least an 80% on her test write an inequality to represent this situation

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)?

Choose the more precise measurement. 26.4 cm or 8.39 cm