How is the product of 4 and 2 shown using integer tiles? 4 positive tiles and 2 positive tiles.
4 negative tiles and 2 negative tiles.
4 sets of 2 positive tiles.
4 sets of 2 negative tiles.

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

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)?

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?