5pound bag cost 3.50 what is unit rate

With this one. will mark brainliest

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

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)?