Suppose you choose a marble from a bag containing 2 red marbles, 5 white marbles, and 3 blue marbles. you return the first marble to the bag and then choose again. find p(red then blue)

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

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)?

Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.