PLEASE HELP I NEED THIS

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.

Find the measure of anglec in the following triangle

How many and of which kind of roots does the equation f(x)=x3−x2−x+1