Four married couples have bought 8 seats in the same row for a concert. In how many different ways can they be seated:
i. Without any restrictions?
ii. If each couple is to sit together?
iii. If all the men sit together to the right of all the women?

Mexico city, mexico, is the world's second largest metropolis and is also one of its fastest-growing cities with a projected growth rate of 3.2% per year. its population in 1991 was 20,899,000 people. use the formula p = 20.899e0.032t to predict its population p in millions with t equal to the number of years after 1991. what is the predicted population to the nearest thousand of mexico city for the year 2010?

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

The scatterplot represents the total fee for hours renting a bike. the line of best fit for the data is y = 6.855x + 10.215. which table shows the correct residual values for the data set?