Last week, Patty's Diner sold 12 milkshakes with whipped cream on top and 36 milkshakes without whipped cream. What percentage of the milkshakes had whipped cream2

Juanita wade's new car has an msrp of $28,902.11 including title and processing fees. the premier package which includes surround sound and dvd player costs three times the amount of the in-style package which includes leather seats and select wheels. the total cost of her new car was $34,290.08 which included the 6.5% sales tax. find the cost of the premier package to the nearest cent.