Miền D giới hạn bởi hai đường tròn y2+x2=1 và x2+y2=25. Khi đó tích phân ∬D(x2+7,6y)dA=∫2π0dθ∫ba[r3cos2θ+C(r )sinθ]dr trong đó

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.