How can you determine whether a triangle is a right triangle

Which of the fallowing best completes the sequence 5,10,15, a) 30 b) 22 c)25 d)35

With: label the vertices and all the elements needed. find x

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)?