An airplane reaches its cruising hight. at this height it travels at a constant speed, or rate and travels 2,000 mile in 4 hours. what is the rate of the plane? if the estimated cost per mile of the plane is $20, what is the cost of the 4 hour travel?

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)?

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).

What is the y-intercept of the line with the equation 3x + 4y = 12?