Which set of ordered pairs is a function? 1 (-3,-1).(-3,0).(-3,3).(-3,5)
2 (-2,-1).(-1,0), (0.0), (2, 1)
3 (-1,-1).(-1,0), (0.0), (0.1)
4 (0.0), (3.0), (3, 3). (4,0)

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)?

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

Julie buys 2kg of apples and 7kg of pears ? 12.70. the pears cost ? 1.30 per kilogram what is the price per kilogram of the apples? show your working out