In 1950, there were 40.3 million cars registered in the united states. in 1990, there were 133.7 million cars registered in the united states. what was the percent increase of registered cars from 1950 to 1990?

Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x

The marriott family bought a new apartment three years ago for $65,000. the apartment is now worth $86,515. assuming a steady rate of growth, what was the yearly rate of appreciation? what is the percent of the yearly rate of appreciation?

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)?