Shereen cosmetics sometimes discount the price of its premium eye shadows to retailers for a promotion
period when the product is advertised to consumers. Such promotions often result in a dramatic increase in
amount of premium eye shadows sold by the manufacturers to retailers. Nevertheless, the manufacturers could
often make more profit by not holding the promotions.
Which of the following, if true, most strongly supports the claim above about the manufacturers' profit?
Naomi drives to the beauty parlor in 60 minutes. On the way back, her average speed is half the average speed
as it was to the way to the parlor. How much time will it take Naomi to travel two round trips to the beauty
parlor?