A research scholar wants to know how many times per hour a certain strand of virus reproduces. The mean is found to be 8.2 reproductions and the population standard deviation is known to be 1.8. If a sample of 619 was used for the study, construct the 85% confidence interval for the true mean number of reproductions per hour for the virus. Round your answers to one decimal place.

Describe the domain and range of y=2(3)^x-2+5

Mozart lenses inc. recently introduced seelites, a thinner lens for eyelasses. of a sample of 800 eyeglass wearers, 246 said they would purchases their next pair of eyeglasses with the new lenses. lenses inc. estimates that the number of people who purchase eyeglasses in a year is 1,700,000. most eyeglasses wearer buy one new pair of eyeglasses a year. what is the annual sales potential for the new lenses.

Solve x+3y=6 and 4x-6y=6 by elimination . show work !