Exercise 1:Hard disks for computers must spin evenly, and one departure from level is calledroll. The roll for any disk can be modeled as a random variable having mean 0.2250 mm and standard deviation 0.0042 mm. The sample mean roll x will be obtained from a random sample of 40 disks. What is the probability that x will lie between 0.2245 and 0.2260mm

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.